Year	Number of
1990	3635.74
1991	3786.88
1992	3945.01
1993	4107.77
1994	4275.75
1995	4455.4
1996	4590.51
1997	4736.82
1998	4889.09
1999	5046.65
2000	5207.62
2001	5362.33
2002	5535.14
2003	5719.07
2004	5914.79
2005	6128.1
2006	6238.34
2007	6354.61
2008	6478.82
2009	6600.6
2010	6727.99
2011	6842.68
2012	6971.36
2013	7101.6
2014	7238.53
2015	7382.75
2016	7535.2