Year	Number of
1990	2486.86
1991	2613.89
1992	2662.59
1993	2755.01
1994	2873.23
1995	3054.1
1996	3190.78
1997	3378.52
1998	3540.89
1999	3609.02
2000	3683.85
2001	3751.96
2002	3835.98
2003	3928.01
2004	4064.75
2005	4191.6
2006	4315.67
2007	4457.26
2008	4559.71
2009	4657.66
2010	4734.97
2011	4858.1
2012	4976.45
2013	5060.56
2014	5108.79
2015	5209.19
2016	5321.59