Year	Number of
1990	4216.91
1991	4372.41
1992	4532.74
1993	4705.51
1994	4900.3
1995	5120.17
1996	5308.06
1997	5508.06
1998	5717.19
1999	5949.92
2000	6196.22
2001	6281.11
2002	6351.86
2003	6410.43
2004	6509.89
2005	6630.31
2006	6700.56
2007	6766.45
2008	6828.44
2009	6895.18
2010	6960.9
2011	7150.14
2012	7356.22
2013	7569.83
2014	7796.44
2015	8045.91
2016	8303.71