Year	Number of
1990	1256.06
1991	1321.45
1992	1391.4
1993	1477.59
1994	1569.91
1995	1672.52
1996	1743.09
1997	1910.19
1998	2052.3
1999	2215.93
2000	2382.11
2001	2455.09
2002	2550.09
2003	2650.68
2004	2764.83
2005	2878.98
2006	2974.62
2007	3059.1
2008	3146.78
2009	3240.26
2010	3345.15
2011	3438.21
2012	3545.03
2013	3673.46
2014	3813.23
2015	3960.95
2016	4091.07