Year	Number of
1990	2895.97
1991	3041.12
1992	3195.28
1993	3359.79
1994	3536.04
1995	3725.74
1996	3864.14
1997	4012.79
1998	4172.48
1999	4338.78
2000	4512.31
2001	4651.23
2002	4794.51
2003	4946.3
2004	5105.5
2005	5273.65
2006	5514.55
2007	5769.86
2008	6043.05
2009	6327.14
2010	6622.15
2011	6914.72
2012	7218.83
2013	7534.63
2014	7863.16
2015	8205.32
2016	8550.79