Year	Number of
1990	580.29
1991	596.9
1992	615.79
1993	629.97
1994	659.6
1995	672.18
1996	690.96
1997	710.75
1998	735.68
1999	768.34
2000	789.79
2001	814.17
2002	833.7
2003	854.14
2004	882.57
2005	911
2006	937.11
2007	965.4
2008	997.75
2009	1030.78
2010	1064.35
2011	1098.93
2012	1134.09
2013	1169.54
2014	1206.56
2015	1246.19
2016	1282.9