| Value | Category | Cases | |
|---|---|---|---|
| 1 | Before 1984 | 163 |
6.9%
|
| 2 | 1985-1989 | 100 |
4.2%
|
| 3 | 1990-1994 | 223 |
9.4%
|
| 4 | 1995-1999 | 305 |
12.9%
|
| 5 | 2000-2004 | 565 |
23.8%
|
| 6 | 2009-2009 | 776 |
32.7%
|
| 7 | 2010 to 2012 | 225 |
9.5%
|
| 8 | Not specifies | 13 |
0.5%
|
| Sysmiss | 493 |