Year	Number of
1990	4678.79
1991	4849.98
1992	5038.37
1993	5239.07
1994	5449.53
1995	5668.22
1996	5788.97
1997	5910.83
1998	6042.16
1999	6181.92
2000	6338.77
2001	6375.32
2002	6426.3
2003	6483.33
2004	6546.16
2005	6619.46
2006	6660.46
2007	6708.39
2008	6766.25
2009	6833.06
2010	6917.56
2011	7109.98
2012	7319.88
2013	7529.41
2014	7755.99
2015	8000.42
2016	8260.33