Year	Number of
1990	2200.5
1991	2257.11
1992	2357.56
1993	2466.66
1994	2568.07
1995	2765.66
1996	2900.55
1997	3029.15
1998	3197.5
1999	3316.74
2000	3466.04
2001	3610.69
2002	3741.84
2003	3895.47
2004	4039.61
2005	4183.89
2006	4369.01
2007	4517.08
2008	4664.03
2009	4813.16
2010	4951.32
2011	5058.55
2012	5149.66
2013	5223.39
2014	5313.75
2015	5378.69
2016	5469.05