| Value | Category | Cases | |
|---|---|---|---|
| 1 | Below 1970 | 1829 |
1.2%
|
| 2 | 1970-1972 | 177 |
0.1%
|
| 3 | 1973-1975 | 244 |
0.2%
|
| 4 | 1976-1978 | 243 |
0.2%
|
| 5 | 1979-1981 | 285 |
0.2%
|
| 6 | 1982-1984 | 300 |
0.2%
|
| 7 | 1985-1987 | 423 |
0.3%
|
| 8 | 1988-1990 | 477 |
0.3%
|
| 9 | 1991-1993 | 471 |
0.3%
|
| 10 | 1994-1996 | 1258 |
0.8%
|
| 11 | 1997-1999 | 2068 |
1.3%
|
| 12 | 2000-2002 | 4382 |
2.8%
|
| 13 | 2003-2005 | 4755 |
3.1%
|
| 14 | 2006-2008 | 8208 |
5.3%
|
| 15 | 2009-2011 | 24888 |
16.1%
|
| 16 | 2012-2014 | 104020 |
67.4%
|
| 99 | Not stated | 208 |
0.1%
|