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Percentage of the population reporting 'American' ancestry (%):
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| 16.1% | 18.5% | 20.8% | 23.1% | 25.4% | 27.8% |
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Percentage of the population reporting 'English' ancestry (%):
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| 11.9% | 12.8% | 13.5% | 14.3% | 15.1% | 15.9% |
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Percentage of the population reporting 'Scotch-Irish' ancestry (%):
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| 3.4% | 5.4% | 7.4% | 9.3% | 11.3% | 13.3% |
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Percentage of the population reporting 'Irish' ancestry (%):
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| 4.3% | 6.2% | 8.0% | 9.8% | 11.7% | 13.5% |
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Percentage of the population reporting 'German' ancestry (%):
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| 9.5% | 10.8% | 12.0% | 13.3% | 14.5% | 15.8% |
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Percentage of the population reporting 'Dutch' ancestry (%):
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Percentage of the population reporting 'Ukrainian' ancestry (%):
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Percentage of the population reporting 'Scottish' ancestry (%):
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| 1.55% | 2.00% | 2.46% | 2.91% | 3.36% | 3.82% |
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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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| 0.34% | 0.70% | 1.05% | 1.40% | 1.76% | 2.12% |
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Percentage of the population reporting 'French Canadian' ancestry (%):
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| 0.04% | 0.30% | 0.55% | 0.81% | 1.06% | 1.32% |
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Percentage of the population reporting 'British' ancestry (%):
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| 0.582% | 0.612% | 0.642% | 0.672% | 0.702% | 0.733% |
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Percentage of the population reporting 'Polish' ancestry (%):
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| 0.00% | 0.25% | 0.50% | 0.75% | 1.00% | 1.25% |
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Percentage of the population reporting 'Northern European' ancestry (%):
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| 0.00% | 0.09% | 0.18% | 0.27% | 0.36% | 0.46% |
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Percentage of the population reporting 'French' ancestry (%):
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| 0.85% | 1.01% | 1.17% | 1.32% | 1.48% | 1.64% |
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Percentage of the population reporting 'Filipino' ancestry (%):
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| 0.00% | 0.22% | 0.45% | 0.67% | 0.89% | 1.12% |
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