Year	Number of
1990	3320.15
1991	3373.53
1992	3453.03
1993	3473.07
1994	3578.89
1995	3703.62
1996	3801.09
1997	3981.22
1998	4024.54
1999	4163.49
2000	4349.01
2001	4095.15
2002	4001.98
2003	3954.64
2004	3916.94
2005	3866.03
2006	3953.14
2007	4002.08
2008	4049.13
2009	4154.14
2010	4257.84
2011	4310.63
2012	4360.35
2013	4418.3
2014	4537.88
2015	4668.94
2016	4818.36