Year	Number of
1990	309.96
1991	333.27
1992	358.91
1993	387.03
1994	417.69
1995	451.32
1996	463.08
1997	475.72
1998	490.07
1999	505.5
2000	522.13
2001	546.7
2002	572.39
2003	600.56
2004	630.07
2005	661.02
2006	694.28
2007	728.97
2008	767.39
2009	807.92
2010	850.99
2011	894.61
2012	942.38
2013	994.18
2014	1048.88
2015	1106.33
2016	1165.03