| Value | Category | Cases | |
|---|---|---|---|
| 1 | Below 1970 | 1896 |
1%
|
| 2 | 1970-1972 | 166 |
0.1%
|
| 3 | 1973-1975 | 234 |
0.1%
|
| 4 | 1976-1978 | 245 |
0.1%
|
| 5 | 1979-1981 | 234 |
0.1%
|
| 6 | 1982-1984 | 265 |
0.1%
|
| 7 | 1985-1987 | 422 |
0.2%
|
| 8 | 1988-1990 | 398 |
0.2%
|
| 9 | 1991-1993 | 419 |
0.2%
|
| 10 | 1994-1996 | 923 |
0.5%
|
| 11 | 1997-1999 | 1527 |
0.8%
|
| 12 | 2000-2002 | 2596 |
1.4%
|
| 13 | 2003-2005 | 3057 |
1.6%
|
| 14 | 2006-2008 | 5367 |
2.8%
|
| 15 | 2009-2011 | 11683 |
6.1%
|
| 16 | 2012-2014 | 32055 |
16.8%
|
| 17 | 2015-2017 | 128413 |
67.5%
|
| 99 | Not stated | 388 |
0.2%
|