Year	Number
1992	42576
1993	46208
1994	32836
1995	28617
1996	27798
1997	25750
1998	27310
1999	30891
2000	34474
2001	38392
2002	31769
2003	33135
2004	33466
2005	33850
2006	37976
2007	38813
2008	38821
2009	36672
2010	41152
2011	39097
2012	39738
2013	41748
2014	36068
2015	41046
2016	39096
2017	37031