Year	Number of
1990	473.19
1991	484.99
1992	505.92
1993	539.74
1994	572.7
1995	600.73
1996	628.68
1997	662.99
1998	693.43
1999	717.02
2000	730.13
2001	741.01
2002	756.86
2003	779.28
2004	808.7
2005	841.82
2006	879.82
2007	907.75
2008	945.1
2009	983.67
2010	1008.35
2011	1022.06
2012	1036.53
2013	1053.95
2014	1069.74
2015	1087.76
2016	1103.65