Year	Number of
1990	1494.04
1991	1579.42
1992	1698.57
1993	1816.95
1994	1931.14
1995	2067.89
1996	2133.14
1997	2232.3
1998	2315.61
1999	2407.19
2000	2505.7
2001	2592.97
2002	2689.59
2003	2801.22
2004	2870.26
2005	2946.62
2006	3005.01
2007	3079.47
2008	3159.41
2009	3242.26
2010	3336.51
2011	3412.7
2012	3500.02
2013	3597.54
2014	3701.55
2015	3808.53
2016	3905.79