Year	Number of
1990	2935.84
1991	3078.82
1992	3233.65
1993	3396.47
1994	3561.79
1995	3726.87
1996	3918.51
1997	4093.37
1998	4270.29
1999	4457.49
2000	4665.81
2001	4847.71
2002	5100.79
2003	5379.13
2004	5671.63
2005	5968.6
2006	6329.22
2007	6681.49
2008	7039.18
2009	7422.64
2010	7852.31
2011	8126.47
2012	8436.7
2013	8780.85
2014	9136.67
2015	9487.05
2016	9736.4