Year | Pop. Size | Density | Pop. Change | Pop. Size | Density | Pop. Change |
Upper | Upper | Upper | Lower | Lower | Lower | |
1976 | 3076 | 34 | 1425 | 19 | ||
1977 | 3403 | 37 | 327 | 1744 | 24 | 319 |
1978 | 3095 | 34 | −308 | 1670 | 23 | −74 |
1979 | 3260 | 36 | 165 | 1891 | 26 | 221 |
1981 | 3251 | 36 | −9 | 1633 | 22 | −258 |
1982 | 4211 | 46 | 960 | 2082 | 28 | 449 |
1983 | 4282 | 47 | 71 | 2262 | 31 | 180 |
1984 | 4534 | 50 | 252 | 2298 | 31 | 36 |
1985 | 3857 | 42 | −677 | 2723 | 37 | 425 |
1986 | 4174 | 46 | 317 | 2567 | 35 | −156 |
1987 | 3566 | 39 | −608 | 1956 | 27 | −611 |
1988 | 3301 | 36 | −265 | 1988 | 27 | 32 |
1989 | 3913 | 43 | 612 | 2408 | 33 | 420 |
1990 | 4107 | 45 | 194 | 2388 | 32 | −16 |
1991 | 3590 | 39 | −517 | 2061 | 28 | −327 |
1992 | 3199 | 35 | −391 | 2301 | 31 | 240 |
1993 | 3192 | 35 | −7 | 2301 | 31 | 240 |
1994 | 3829 | 42 | 637 | 2620 | 36 | 459 |
1995 | 3298 | 36 | −531 | 2588 | 35 | −32 |
1996 | 3497 | 37 | 109 | 2119 | 29 | −469 |
1997 | 3329 | 37 | −78 | 2001 | 27 | −118 |
1998 | 3188 | 35 | −141 | 1716 | 23 | −285 |
1999 | 3401 | 37 | 213 | 1788 | 24 | 72 |
2000 | 3605 | 40 | 204 | 2333 | 32 | 545 |
2001 | 3990 | 44 | 385 | 2179 | 30 | −154 |
2002 | 4019 | 44 | 29 | 2253 | 31 | 74 |
2004 | 4068 | 45 | 49 | 2282 | 31 | 29 |
2005 | 4138 | 45 | 70 | 1992 | 27 | -290 |
2006 | 4085 | 45 | −53 | 2284 | 31 | 292 |
2008 | 4151 | 46 | 37 | 2167 | 29 | −117 |
2009 | 4087 | 45 | −64 | 2244 | 30 | 77 |
2010 | 4355 | 48 | 268 | 1795 | 24 | −449 |
2011 | 4554 | 50 | 99 | 2184 | 29 | 389 |
2012 | 4351 | 48 | −203 | 2426 | 33 | 242 |
Mean | 4000 | 41 | 2000 | 29 | ||
(3763) | (2137) |