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Percentage of the population reporting 'German' ancestry (%):
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| 17.6% | 19.6% | 21.4% | 23.3% | 25.2% | 27.1% |
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Percentage of the population reporting 'Irish' ancestry (%):
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| 16.3% | 17.3% | 18.3% | 19.3% | 20.2% | 21.3% |
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Percentage of the population reporting 'American' ancestry (%):
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| 7.7% | 9.9% | 12.0% | 14.1% | 16.2% | 18.4% |
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Percentage of the population reporting 'English' ancestry (%):
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| 5.2% | 7.3% | 9.3% | 11.4% | 13.4% | 15.5% |
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Percentage of the population reporting 'Italian' ancestry (%):
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Percentage of the population reporting 'Dutch' ancestry (%):
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| 1.0% | 3.4% | 5.8% | 8.2% | 10.6% | 13.0% |
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Percentage of the population reporting 'Scottish' ancestry (%):
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| 1.46% | 1.73% | 1.99% | 2.25% | 2.52% | 2.78% |
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Percentage of the population reporting 'Polish' ancestry (%):
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Percentage of the population reporting 'European' ancestry (%):
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| 0.00% | 0.32% | 0.64% | 0.96% | 1.28% | 1.60% |
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Percentage of the population reporting 'Norwegian' ancestry (%):
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| 0.00% | 0.32% | 0.65% | 0.97% | 1.30% | 1.63% |
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Percentage of the population reporting 'Danish' ancestry (%):
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| 0.00% | 0.08% | 0.17% | 0.25% | 0.33% | 0.42% |
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Percentage of the population reporting 'Hungarian' ancestry (%):
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| 0.00% | 0.46% | 0.91% | 1.37% | 1.82% | 2.28% |
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Percentage of the population reporting 'French' ancestry (%):
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Percentage of the population reporting 'Welsh' ancestry (%):
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| 0.00% | 0.10% | 0.20% | 0.30% | 0.41% | 0.51% |
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Percentage of the population reporting 'Scotch-Irish' ancestry (%):
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| 0.00% | 0.16% | 0.32% | 0.49% | 0.65% | 0.82% |
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Percentage of the population reporting ' Mexican' ancestry (%):
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| 0.00% | 0.43% | 0.85% | 1.28% | 1.70% | 2.13% |
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Percentage of the population reporting ' Central American' ancestry (%):
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| 0.00% | 0.11% | 0.23% | 0.34% | 0.46% | 0.57% |
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Percentage of the population reporting ' Nicaraguan' ancestry (%):
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| 0.00% | 0.11% | 0.23% | 0.34% | 0.46% | 0.57% |
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Percentage of the population reporting ' Spanish' ancestry (%):
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| 0.00% | 0.11% | 0.22% | 0.33% | 0.44% | 0.55% |
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Percentage of the population reporting 'German' ancestry (%):
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| 22.8% | 24.0% | 25.1% | 26.2% | 27.3% | 28.5% |
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Percentage of the population reporting 'Irish' ancestry (%):
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| 13.1% | 14.5% | 15.8% | 17.1% | 18.4% | 19.7% |
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Percentage of the population reporting 'American' ancestry (%):
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| 11.8% | 13.4% | 14.8% | 16.3% | 17.8% | 19.3% |
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Percentage of the population reporting 'English' ancestry (%):
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| 6.8% | 8.5% | 10.3% | 12.0% | 13.7% | 15.5% |
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Percentage of the population reporting 'Italian' ancestry (%):
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Percentage of the population reporting 'Dutch' ancestry (%):
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Percentage of the population reporting 'Scottish' ancestry (%):
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| 1.26% | 1.56% | 1.85% | 2.15% | 2.44% | 2.74% |
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Percentage of the population reporting 'Polish' ancestry (%):
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Percentage of the population reporting 'European' ancestry (%):
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| 0.42% | 0.60% | 0.77% | 0.94% | 1.11% | 1.29% |
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Percentage of the population reporting 'Norwegian' ancestry (%):
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| 0.00% | 0.14% | 0.27% | 0.41% | 0.54% | 0.68% |
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Percentage of the population reporting 'Danish' ancestry (%):
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| 0.00% | 0.07% | 0.13% | 0.20% | 0.27% | 0.34% |
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Percentage of the population reporting 'Hungarian' ancestry (%):
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| 0.00% | 0.09% | 0.18% | 0.26% | 0.35% | 0.45% |
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Percentage of the population reporting 'French' ancestry (%):
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| 0.59% | 0.79% | 0.98% | 1.17% | 1.36% | 1.56% |
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Percentage of the population reporting 'Welsh' ancestry (%):
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| 0.00% | 0.18% | 0.35% | 0.53% | 0.71% | 0.89% |
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Percentage of the population reporting 'Scotch-Irish' ancestry (%):
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| 0.00% | 0.24% | 0.49% | 0.73% | 0.97% | 1.22% |
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Percentage of the population reporting ' Mexican' ancestry (%):
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| 0.40% | 0.76% | 1.10% | 1.45% | 1.80% | 2.16% |
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Percentage of the population reporting ' Central American' ancestry (%):
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| 0.00% | 0.09% | 0.18% | 0.28% | 0.37% | 0.46% |
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Percentage of the population reporting ' Nicaraguan' ancestry (%):
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| 0.00% | 0.09% | 0.18% | 0.28% | 0.37% | 0.46% |
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Percentage of the population reporting ' Spanish' ancestry (%):
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| 0.00% | 0.09% | 0.18% | 0.26% | 0.35% | 0.45% |
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