Year	Number of
1990	585.91
1991	617.39
1992	655.33
1993	696.56
1994	737.08
1995	775.1
1996	796.24
1997	813.05
1998	826.73
1999	840.15
2000	855.41
2001	863.63
2002	873.5
2003	884.83
2004	898.15
2005	914.26
2006	932.7
2007	953.88
2008	978.65
2009	1005.62
2010	1034.97
2011	1062.26
2012	1092.06
2013	1123.62
2014	1157.39
2015	1193.5
2016	1229.24