), or 21.51%, is water. [ 10 ] Demographics [ edit ] Historical population Census Pop. Note %± 1790 1,932 — 1820 3,421 — 1830 3,840 12.2% 1840 5,592 45.6% 1850 7,758 38.7% 1860 10,074 29.9% 1870 11,694 16.1% 1880 12,664 8.3% 1890 15,139 19.5% 1900