Year	Number
1974	984
1976	1199
1984	1532
1985	1568
1991	874
1992	1114
1993	1119
1995	686
1996	1337
2003	2546
2005	2483
2008	2458
2009	2471
2010	2565
2011	2874
2012	3003
2014	2823
2015	2916
2016	2940
2017	2979
2018	3104
2019	3132
2020	3283
2021	3783