Year	Number of
1990	4006.03
1991	4218.62
1992	4446.88
1993	4683.54
1994	4929.09
1995	5212.92
1996	5394.45
1997	5575.17
1998	5767.79
1999	5947.42
2000	6155.84
2001	6234.55
2002	6287.22
2003	6337.73
2004	6391.88
2005	6451.53
2006	6543.55
2007	6629.62
2008	6722.1
2009	6818.61
2010	6923.99
2011	7074.73
2012	7205.54
2013	7349.03
2014	7493.09
2015	7637.71
2016	7784.15