| Year | Pop. | ±% p.a. |
|---|
| 1793 | 2,402 | — |
|---|
| 1800 | 2,529 | +0.74% |
|---|
| 1806 | 2,972 | +2.73% |
|---|
| 1821 | 3,608 | +1.30% |
|---|
| 1836 | 4,113 | +0.88% |
|---|
| 1841 | 4,243 | +0.62% |
|---|
| 1861 | 6,075 | +1.81% |
|---|
| 1866 | 6,802 | +2.29% |
|---|
| 1871 | 6,863 | +0.18% |
|---|
| 1875 | 8,466 | +5.39% |
|---|
| 1880 | 9,573 | +2.49% |
|---|
| 1885 | 10,719 | +2.29% |
|---|
| 1890 | 13,076 | +4.06% |
|---|
| 1895 | 13,888 | +1.21% |
|---|
| 1900 | 14,685 | +1.12% |
|---|
| 1905 | 14,919 | +0.32% |
|---|
| | Year | Pop. | ±% p.a. |
|---|
| 1910 | 14,253 | −0.91% |
|---|
| 1921 | 14,197 | −0.04% |
|---|
| 1926 | 13,812 | −0.55% |
|---|
| 1931 | 14,371 | +0.80% |
|---|
| 1936 | 16,001 | +2.17% |
|---|
| 1946 | 13,375 | −1.78% |
|---|
| 1954 | 14,947 | +1.40% |
|---|
| 1962 | 17,866 | +2.25% |
|---|
| 1968 | 24,284 | +5.25% |
|---|
| 1975 | 25,684 | +0.80% |
|---|
| 1982 | 24,763 | −0.52% |
|---|
| 1990 | 23,117 | −0.86% |
|---|
| 1999 | 23,202 | +0.04% |
|---|
| 2007 | 21,835 | −0.76% |
|---|
| 2012 | 21,605 | −0.21% |
|---|
| 2017 | 20,783 | −0.77% |
|---|
|