| Year | Pop. | ±% p.a. |
|---|
| 1793 | 1,539 | — |
|---|
| 1800 | 1,769 | +2.01% |
|---|
| 1806 | 1,881 | +1.03% |
|---|
| 1821 | 3,110 | +3.41% |
|---|
| 1836 | 4,428 | +2.38% |
|---|
| 1841 | 4,288 | −0.64% |
|---|
| 1861 | 4,860 | +0.63% |
|---|
| 1866 | 5,691 | +3.21% |
|---|
| 1871 | 5,411 | −1.00% |
|---|
| 1875 | 6,173 | +3.35% |
|---|
| 1880 | 7,114 | +2.88% |
|---|
| 1885 | 7,839 | +1.96% |
|---|
| 1890 | 9,575 | +4.08% |
|---|
| 1895 | 7,867 | −3.85% |
|---|
| 1900 | 8,208 | +0.85% |
|---|
| 1905 | 8,628 | +1.00% |
|---|
| | Year | Pop. | ±% p.a. |
|---|
| 1910 | 9,704 | +2.38% |
|---|
| 1921 | 10,514 | +0.73% |
|---|
| 1926 | 11,569 | +1.93% |
|---|
| 1931 | 11,491 | −0.14% |
|---|
| 1936 | 12,167 | +1.15% |
|---|
| 1946 | 9,599 | −2.34% |
|---|
| 1954 | 21,591 | +10.66% |
|---|
| 1962 | 21,704 | +0.07% |
|---|
| 1968 | 23,120 | +1.06% |
|---|
| 1975 | 25,244 | +1.26% |
|---|
| 1982 | 27,187 | +1.06% |
|---|
| 1990 | 27,076 | −0.05% |
|---|
| 1999 | 22,807 | −1.89% |
|---|
| 2007 | 21,801 | −0.56% |
|---|
| 2012 | 21,475 | −0.30% |
|---|
| 2017 | 21,552 | +0.07% |
|---|
|