0-5 years
6-10 years
11-15 years
16-18 years
Not mentioned
2013
220
492
880
325
1,085
2014
276
680
940
108
1,504
2015
213
766
957
339
1,493
2016
248
750
1,123
439
1,579
2017
169
640
961
351
1,324