| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 29700 |
7.7%
|
|
| 1996 | 15921 |
4.1%
|
|
| 1997 | 29811 |
7.7%
|
|
| 1998 | 18981 |
4.9%
|
|
| 1999 | 26134 |
6.8%
|
|
| 2002 | 26221 |
6.8%
|
|
| 2003 | 26375 |
6.9%
|
|
| 2004 | 26192 |
6.8%
|
|
| 2005 | 28104 |
7.3%
|
|
| 2006 | 28000 |
7.3%
|
|
| 2007 | 29238 |
7.6%
|
|
| 2008 | 24333 |
6.3%
|
|
| 2009 | 25303 |
6.6%
|
|
| 2010 | 25561 |
6.6%
|
|
| 2011 | 25096 |
6.5%
|