Year	Number of
1990	2214.03
1991	2322.18
1992	2435.75
1993	2558.03
1994	2682.6
1995	2808.24
1996	2941.35
1997	3073.12
1998	3217.73
1999	3360.2
2000	3488.45
2001	3607.24
2002	3710.09
2003	3813.25
2004	3921.17
2005	4036.67
2006	4151.57
2007	4265.89
2008	4386.21
2009	4534.19
2010	4686.26
2011	4830.62
2012	4984.41
2013	5151.17
2014	5328.21
2015	5524.71
2016	5725.97