Year	Number of
1990	464.21
1991	475.19
1992	489.03
1993	509.5
1994	527.02
1995	548.78
1996	561.73
1997	579.17
1998	602.93
1999	636.44
2000	668.3
2001	698.41
2002	728.92
2003	763.68
2004	800.1
2005	837.37
2006	871.94
2007	893.8
2008	915.45
2009	941.45
2010	954.92
2011	943.49
2012	940.75
2013	943.17
2014	947.85
2015	956.12
2016	962.53