| قيمة | فئة | حالات | |
|---|---|---|---|
| 1990 | 3 |
0.2%
|
|
| 1991 | 1 |
0.1%
|
|
| 1993 | 1 |
0.1%
|
|
| 1994 | 1 |
0.1%
|
|
| 1995 | 3 |
0.2%
|
|
| 1996 | 2 |
0.1%
|
|
| 1997 | 3 |
0.2%
|
|
| 1998 | 2 |
0.1%
|
|
| 1999 | 8 |
0.5%
|
|
| 2000 | 35 |
2.2%
|
|
| 2001 | 15 |
0.9%
|
|
| 2002 | 31 |
2%
|
|
| 2003 | 56 |
3.5%
|
|
| 2004 | 122 |
7.7%
|
|
| 2005 | 205 |
13%
|
|
| 2006 | 278 |
17.6%
|
|
| 2007 | 317 |
20%
|
|
| 2008 | 265 |
16.8%
|
|
| 2009 | 155 |
9.8%
|
|
| 2010 | 79 |
5%
|