| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 11 |
0%
|
|
| 1981 | 2 |
0%
|
|
| 1982 | 14 |
0%
|
|
| 1983 | 20 |
0%
|
|
| 1984 | 32 |
0%
|
|
| 1985 | 42 |
0.1%
|
|
| 1986 | 73 |
0.1%
|
|
| 1987 | 99 |
0.1%
|
|
| 1988 | 206 |
0.3%
|
|
| 1989 | 180 |
0.3%
|
|
| 1990 | 354 |
0.5%
|
|
| 1991 | 338 |
0.5%
|
|
| 1992 | 510 |
0.8%
|
|
| 1993 | 598 |
0.9%
|
|
| 1994 | 675 |
1%
|
|
| 1995 | 772 |
1.2%
|
|
| 1996 | 995 |
1.5%
|
|
| 1997 | 926 |
1.4%
|
|
| 1998 | 1455 |
2.2%
|
|
| 1999 | 1275 |
1.9%
|
|
| 2000 | 2032 |
3.1%
|
|
| 2001 | 1638 |
2.5%
|
|
| 2002 | 1930 |
2.9%
|
|
| 2003 | 2082 |
3.2%
|
|
| 2004 | 2354 |
3.6%
|
|
| 2005 | 2354 |
3.6%
|
|
| 2006 | 2890 |
4.4%
|
|
| 2007 | 2364 |
3.6%
|
|
| 2008 | 3325 |
5%
|
|
| 2009 | 2856 |
4.3%
|
|
| 2010 | 3779 |
5.7%
|
|
| 2011 | 3749 |
5.7%
|
|
| 2012 | 3822 |
5.8%
|
|
| 2013 | 3652 |
5.5%
|
|
| 2014 | 4086 |
6.2%
|
|
| 2015 | 3948 |
6%
|
|
| 2016 | 3753 |
5.7%
|
|
| 2017 | 3082 |
4.7%
|
|
| 2018 | 3495 |
5.3%
|
|
| 2019 | 184 |
0.3%
|
|
| 9997 | Inconsistent | 126 |
0.2%
|
| 9999 | NO RESPONSE | 2 |
0%
|