| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 1 |
3.2%
|
|
| 1982 | 1 |
3.2%
|
|
| 1984 | 1 |
3.2%
|
|
| 1985 | 2 |
6.5%
|
|
| 1986 | 3 |
9.7%
|
|
| 1992 | 1 |
3.2%
|
|
| 1994 | 1 |
3.2%
|
|
| 1998 | 1 |
3.2%
|
|
| 2009 | 3 |
9.7%
|
|
| 2010 | 14 |
45.2%
|
|
| 2011 | 2 |
6.5%
|
|
| 2012 | 1 |
3.2%
|