Year	Number of
1990	5212.78
1991	5401.9
1992	5602.9
1993	5872.54
1994	6142.37
1995	6427.62
1996	6780.98
1997	6941.93
1998	7151.1
1999	7284.15
2000	7439.16
2001	7630.58
2002	7793.13
2003	8044.24
2004	7897.18
2005	8089.13
2006	8289.66
2007	8425.67
2008	8477.33
2009	8592.11
2010	8789.21
2011	8955.64
2012	9109.81
2013	9290.95
2014	9573.48
2015	9870.36
2016	10178.68