| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 17 |
0%
|
|
| 1981 | 25 |
0%
|
|
| 1982 | 22 |
0%
|
|
| 1983 | 42 |
0.1%
|
|
| 1984 | 82 |
0.1%
|
|
| 1985 | 76 |
0.1%
|
|
| 1986 | 105 |
0.1%
|
|
| 1987 | 175 |
0.2%
|
|
| 1988 | 391 |
0.5%
|
|
| 1989 | 655 |
0.8%
|
|
| 1990 | 847 |
1%
|
|
| 1991 | 709 |
0.9%
|
|
| 1992 | 915 |
1.1%
|
|
| 1993 | 950 |
1.2%
|
|
| 1994 | 1560 |
1.9%
|
|
| 1995 | 1224 |
1.5%
|
|
| 1996 | 1437 |
1.7%
|
|
| 1997 | 1787 |
2.2%
|
|
| 1998 | 2175 |
2.6%
|
|
| 1999 | 3488 |
4.2%
|
|
| 2000 | 3707 |
4.5%
|
|
| 2001 | 3523 |
4.3%
|
|
| 2002 | 3392 |
4.1%
|
|
| 2003 | 3241 |
3.9%
|
|
| 2004 | 4008 |
4.9%
|
|
| 2005 | 4279 |
5.2%
|
|
| 2006 | 3552 |
4.3%
|
|
| 2007 | 4374 |
5.3%
|
|
| 2008 | 3682 |
4.5%
|
|
| 2009 | 4953 |
6%
|
|
| 2010 | 4287 |
5.2%
|
|
| 2011 | 4256 |
5.2%
|
|
| 2012 | 4054 |
4.9%
|
|
| 2013 | 3496 |
4.2%
|
|
| 2014 | 3294 |
4%
|
|
| 2015 | 2429 |
2.9%
|
|
| 2016 | 1836 |
2.2%
|
|
| 2017 | 1475 |
1.8%
|
|
| 2018 | 862 |
1%
|
|
| 2019 | 444 |
0.5%
|
|
| 2020 | 23 |
0%
|
|
| 9997 | Inconsistent | 611 |
0.7%
|
| 9999 | NO RESPONSE | 16 |
0%
|