Year	Number of
1990	2346.63
1991	2396.14
1992	2502.43
1993	2586.39
1994	2682.7
1995	2821.23
1996	2910.42
1997	3027.33
1998	3160.94
1999	3121.71
2000	3251.11
2001	2828.08
2002	2623.68
2003	2510.72
2004	2515.86
2005	2568.15
2006	2604.12
2007	2786.06
2008	2811.17
2009	2931.49
2010	3128.73
2011	3298.16
2012	3624.82
2013	4170.43
2014	4895.5
2015	5241.96
2016	5579.96