Year	Number of
1990	36673.95
1991	36928.9
1992	37017.49
1993	36880.56
1994	36599.91
1995	36558.95
1996	36385.55
1997	36181.08
1998	35981.72
1999	35891.22
2000	35555.52
2001	35332.53
2002	35220.14
2003	35294.4
2004	35597.27
2005	35993.32
2006	36363.23
2007	36711.4
2008	37007.18
2009	37157.97
2010	37511.85
2011	37569.19
2012	38522.28
2013	39075.13
2014	39598.13
2015	40421.18
2016	41271.05