| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2010 | 1044 |
6.9%
|
| 2 | 2011 | 2084 |
13.7%
|
| 3 | 2012 | 2234 |
14.7%
|
| 4 | 2013 | 2173 |
14.3%
|
| 5 | 2014 | 2373 |
15.6%
|
| 6 | 2015 - before introduction of birth testing | 582 |
3.8%
|
| 7 | 2015 - after introduction of birth testing | 2221 |
14.6%
|
| 8 | 2016 | 2523 |
16.6%
|