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Percentage of the population reporting 'Irish' ancestry (%):
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| 14.1% | 15.9% | 17.7% | 19.5% | 21.3% | 23.1% |
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Percentage of the population reporting 'German' ancestry (%):
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| 19.6% | 20.5% | 21.5% | 22.4% | 23.3% | 24.3% |
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Percentage of the population reporting 'English' ancestry (%):
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| 17.8% | 18.5% | 19.1% | 19.8% | 20.4% | 21.1% |
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Percentage of the population reporting 'Italian' ancestry (%):
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Percentage of the population reporting 'Norwegian' ancestry (%):
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Percentage of the population reporting 'American' ancestry (%):
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Percentage of the population reporting 'French' ancestry (%):
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| 3.13% | 3.44% | 3.73% | 4.03% | 4.33% | 4.63% |
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Percentage of the population reporting 'Scandinavian' ancestry (%):
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| 1.09% | 1.17% | 1.25% | 1.32% | 1.40% | 1.48% |
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Percentage of the population reporting 'Belgian' 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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| 0.49% | 0.79% | 1.09% | 1.39% | 1.69% | 1.99% |
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Percentage of the population reporting 'Dutch' ancestry (%):
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Percentage of the population reporting 'Scotch-Irish' ancestry (%):
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| 2.08% | 2.26% | 2.43% | 2.60% | 2.78% | 2.96% |
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Percentage of the population reporting 'British' ancestry (%):
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| 0.21% | 0.52% | 0.83% | 1.14% | 1.45% | 1.77% |
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Percentage of the population reporting 'Croatian' ancestry (%):
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| 0.000% | 0.050% | 0.099% | 0.149% | 0.199% | 0.249% |
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Percentage of the population reporting 'Eastern European' ancestry (%):
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| 0.00% | 0.09% | 0.19% | 0.28% | 0.38% | 0.48% |
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Percentage of the population reporting ' Mexican' ancestry (%):
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Percentage of the population reporting ' Puerto Rican' ancestry (%):
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| 0.00% | 0.28% | 0.55% | 0.83% | 1.11% | 1.39% |
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Percentage of the population reporting ' Cuban' ancestry (%):
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| 0.000% | 0.028% | 0.056% | 0.084% | 0.112% | 0.141% |
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Percentage of the population reporting 'Mongolian' ancestry (%):
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| 0.00% | 0.05% | 0.11% | 0.16% | 0.22% | 0.28% |
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Percentage of the population reporting 'Chinese' ancestry (%):
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| 0.00% | 0.20% | 0.40% | 0.60% | 0.79% | 1.00% |
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