Census data for Sønderborg County
| 1769 | 3 | 4 | 0 | 0.00% | 805 | 403 | 50.06% | 402 | 49.94% | 0 | 0.00% |
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| 1803 | 3 | 20 | 59 | 11.43% | 23,653 | 11,435 | 48.34% | 12,214 | 51.64% | 4 | 0.02% |
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| 1835 | 3 | 20 | 572 | 0.00% | 2 | 0 | 0.00% | 0 | 0.00% | 2 | 100.00% |
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| 1840 | 3 | 20 | 619 | 0.00% | 8 | 0 | 0.00% | 0 | 0.00% | 8 | 100.00% |
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| 1845 | 3 | 20 | 54 | 11.08% | 29,772 | 14,541 | 48.84% | 15,224 | 51.14% | 7 | 0.02% |
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| 1850 | 3 | 20 | 0 | 0.00% | 1 | 0 | 0.00% | 0 | 0.00% | 1 | 100.00% |
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| 1855 | 3 | 20 | 754 | 0.00% | 2 | 0 | 0.00% | 0 | 0.00% | 2 | 100.00% |
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| 1860 | 3 | 20 | 974 | 77.52% | 31,870 | 15,471 | 48.54% | 16,381 | 51.40% | 18 | 0.06% |
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| 1921 | 3 | 20 | 6,085 | 100.00% | 2,606 | 1,255 | 48.16% | 1,338 | 51.34% | 13 | 0.50% |
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| 1925 | 3 | 20 | 7,780 | 0.00% | 32 | 0 | 0.00% | 0 | 0.00% | 32 | 100.00% |
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| 1930 | 3 | 20 | 9,184 | 0.00% | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
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| 1940 | 3 | 20 | 23,617 | 100.00% | 1,284 | 662 | 51.56% | 611 | 47.59% | 11 | 0.86% |