| Value | Category | Cases | |
|---|---|---|---|
| 1972 | 1 |
0%
|
|
| 1973 | 1 |
0%
|
|
| 1975 | 1 |
0%
|
|
| 1978 | 1 |
0%
|
|
| 1979 | 1 |
0%
|
|
| 1980 | 3 |
0%
|
|
| 1981 | 1 |
0%
|
|
| 1982 | 1 |
0%
|
|
| 1984 | 3 |
0%
|
|
| 1985 | 6 |
0%
|
|
| 1986 | 2 |
0%
|
|
| 1987 | 9 |
0%
|
|
| 1988 | 7 |
0%
|
|
| 1989 | 10 |
0%
|
|
| 1990 | 21 |
0%
|
|
| 1991 | 9 |
0%
|
|
| 1992 | 30 |
0%
|
|
| 1993 | 38 |
0%
|
|
| 1994 | 24 |
0%
|
|
| 1995 | 44 |
0%
|
|
| 1996 | 44 |
0%
|
|
| 1997 | 41 |
0%
|
|
| 1998 | 114 |
0.1%
|
|
| 1999 | 70 |
0.1%
|
|
| 2000 | 255 |
0.2%
|
|
| 2001 | 198 |
0.2%
|
|
| 2002 | 262 |
0.2%
|
|
| 2003 | 436 |
0.4%
|
|
| 2004 | 503 |
0.4%
|
|
| 2005 | 769 |
0.7%
|
|
| 2006 | 1003 |
0.9%
|
|
| 2007 | 1523 |
1.3%
|
|
| 2008 | 2483 |
2.2%
|
|
| 2009 | 3682 |
3.2%
|
|
| 2010 | 7237 |
6.3%
|
|
| 2011 | 12195 |
10.6%
|
|
| 2012 | 38899 |
33.9%
|
|
| 2013 | 44743 |
39%
|
