Year	Number of
1990	2908.49
1991	2946.73
1992	3002.27
1993	3046
1994	3128.16
1995	3232.41
1996	3329.97
1997	3409.21
1998	3493.73
1999	3590.25
2000	3689.29
2001	3789.66
2002	3887.72
2003	4014.83
2004	4091.83
2005	4148.09
2006	4227.66
2007	4344.17
2008	4410.93
2009	4460.87
2010	4490.8
2011	4546.9
2012	4625.98
2013	4699.27
2014	4748.27
2015	4814.97
2016	4909