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Percentage of the population reporting 'German' ancestry (%):
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| 15.1% | 17.1% | 19.1% | 21.1% | 23.0% | 25.0% |
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Percentage of the population reporting 'English' ancestry (%):
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| 7.6% | 9.0% | 10.4% | 11.8% | 13.1% | 14.6% |
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Percentage of the population reporting 'Irish' ancestry (%):
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| 8.8% | 10.1% | 11.4% | 12.6% | 13.9% | 15.2% |
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Percentage of the population reporting 'Italian' ancestry (%):
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Percentage of the population reporting 'Swedish' ancestry (%):
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| 1.83% | 2.19% | 2.54% | 2.90% | 3.25% | 3.61% |
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Percentage of the population reporting 'Norwegian' ancestry (%):
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| 2.32% | 2.45% | 2.56% | 2.68% | 2.79% | 2.91% |
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Percentage of the population reporting 'French' ancestry (%):
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| 3.63% | 3.90% | 4.16% | 4.42% | 4.69% | 4.96% |
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Percentage of the population reporting 'American' ancestry (%):
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| 1.97% | 2.39% | 2.80% | 3.21% | 3.62% | 4.03% |
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Percentage of the population reporting 'Scottish' ancestry (%):
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| 3.31% | 3.50% | 3.67% | 3.85% | 4.03% | 4.21% |
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Percentage of the population reporting 'Swiss' ancestry (%):
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| 0.00% | 0.28% | 0.56% | 0.84% | 1.12% | 1.41% |
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Percentage of the population reporting 'Czech' ancestry (%):
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| 1.77% | 1.88% | 1.99% | 2.11% | 2.22% | 2.33% |
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Percentage of the population reporting 'Dutch' ancestry (%):
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| 1.95% | 2.07% | 2.19% | 2.30% | 2.42% | 2.54% |
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Percentage of the population reporting 'Austrian' ancestry (%):
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| 0.08% | 0.18% | 0.26% | 0.35% | 0.44% | 0.53% |
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Percentage of the population reporting 'Czechoslovakian' ancestry (%):
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| 0.13% | 0.21% | 0.28% | 0.36% | 0.43% | 0.51% |
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Percentage of the population reporting 'Welsh' ancestry (%):
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| 0.873% | 0.895% | 0.916% | 0.938% | 0.959% | 0.980% |
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Percentage of the population reporting ' Mexican' ancestry (%):
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| 2.6% | 6.8% | 11.0% | 15.2% | 19.3% | 23.6% |
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Percentage of the population reporting ' Central American' ancestry (%):
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| 0.10% | 0.53% | 0.96% | 1.39% | 1.82% | 2.25% |
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Percentage of the population reporting ' Dominican' ancestry (%):
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| 0.00% | 0.07% | 0.14% | 0.22% | 0.29% | 0.37% |
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Percentage of the population reporting ' Salvadoran' ancestry (%):
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| 0.00% | 0.07% | 0.13% | 0.20% | 0.26% | 0.33% |
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Percentage of the population reporting ' Puerto Rican' ancestry (%):
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| 0.216% | 0.266% | 0.316% | 0.365% | 0.414% | 0.464% |
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Percentage of the population reporting 'Vietnamese' ancestry (%):
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| 0.00% | 0.12% | 0.24% | 0.37% | 0.49% | 0.62% |
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Percentage of the population reporting 'Chinese' ancestry (%):
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| 0.05% | 0.14% | 0.23% | 0.32% | 0.40% | 0.49% |
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Percentage of the population reporting 'Japanese' ancestry (%):
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| 0.0000% | 0.0048% | 0.0096% | 0.0145% | 0.0193% | 0.0241% |
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