| Value | Category | Cases | |
|---|---|---|---|
| -7 | 1 |
1.1%
|
|
| -7.0 | 29 |
30.9%
|
|
| -9 | 1 |
1.1%
|
|
| -9.0 | 1 |
1.1%
|
|
| 0 | 6 |
6.4%
|
|
| 1980 | 1 |
1.1%
|
|
| 1983 | 1 |
1.1%
|
|
| 1984 | 1 |
1.1%
|
|
| 1992 | 2 |
2.1%
|
|
| 1998 | 2 |
2.1%
|
|
| 1999 | 2 |
2.1%
|
|
| 2001 | 1 |
1.1%
|
|
| 2002 | 1 |
1.1%
|
|
| 2004 | 2 |
2.1%
|
|
| 2005 | 6 |
6.4%
|
|
| 2006 | 21 |
22.3%
|
|
| 2007 | 12 |
12.8%
|
|
| 2008 | 4 |
4.3%
|