Year	Number of
1990	3609.29
1991	3701.54
1992	3787.3
1993	3917.84
1994	4054.1
1995	4169.64
1996	4299.13
1997	4431.81
1998	4543.72
1999	4720.4
2000	4872.85
2001	5149.06
2002	5402.19
2003	5656.49
2004	5899.72
2005	6138.35
2006	6408.53
2007	6650.67
2008	6834.63
2009	7820.92
2010	7916.47
2011	8106.85
2012	8258.92
2013	8390.43
2014	8544.31
2015	8751.31
2016	8916.75