| Years | Total external migration | ||
| Arrived | Departed | Migration growth, outflow (−) | |
| 1991 | 37.6 | 71.3 | −33.8 |
| 1992 | 26.3 | 103.7 | −77.5 |
| 1993 | 23.0 | 143.6 | −120.6 |
| 1994 | 20.1 | 71.2 | −51.1 |
| 1995 | 18.4 | 37.3 | −18.9 |
| 1996 | 15.9 | 27.6 | −11.7 |
| 1997 | 12.8 | 19.5 | −6.7 |
| 1998 | 10.2 | 15.7 | −5.5 |
| 1999 | 7.9 | 17.8 | −9.9 |
| 2000 | 5.3 | 27.9 | −22.5 |
| 2001 | 5.0 | 31.6 | −26.6 |
| 2002 | 4.9 | 32.7 | −27.8 |
| 2003 | 4.4 | 21.2 | −16.7 |
| 2004 | 3.2 | 22.6 | −19.3 |
| 2005 | 3.7 | 30.7 | −26.9 |
| 2006 | 3.4 | 34.4 | −31.0 |
| 2007 | 3.9 | 54.6 | −50.6 |
| 2008 | 3.4 | 41.2 | −37.7 |
| 2009 | 3.8 | 33.3 | −29.5 |