| Year | Immigrants | Emigrants | Net Migration |
| 1971 | 1. 9 | 8.0 | -6.1 |
| 1981 | 1.6 | 4.3 | -3.2 |
| 1991 | 2.2 | 2.9 | -0.6 |
| 2001 | 3.6 | 1.7 | 1.4 |
| 2011 | 5.5 | 1.1 | 4.1 |