Year	Number of
1990	5925.21
1991	6131.48
1992	6338.39
1993	6541.46
1994	6764.26
1995	7030.94
1996	7201.25
1997	7383.51
1998	7579.86
1999	7774.39
2000	7957.02
2001	8067.01
2002	8178.78
2003	8297.62
2004	8440.1
2005	8608.21
2006	8664.32
2007	8729.16
2008	8801.22
2009	8881.58
2010	8974.83
2011	9159.49
2012	9343.55
2013	9526.08
2014	9736.95
2015	9952.74
2016	10181.94