Year	Number of
1990	1894.62
1991	1962.2
1992	2033.8
1993	2112.89
1994	2195.82
1995	2283.6
1996	2462.65
1997	2657.06
1998	2869.84
1999	3104.42
2000	3364.81
2001	3460.63
2002	3563.99
2003	3674.15
2004	3791.09
2005	3914.72
2006	4024.3
2007	4134.7
2008	4251.93
2009	4378.59
2010	4517.57
2011	4690.75
2012	4879.73
2013	5083.15
2014	5302.09
2015	5537.49
2016	5793.83