Year	Number of
1990	526.83
1991	538.57
1992	554.02
1993	577.22
1994	596.6
1995	619.84
1996	633.31
1997	651.73
1998	675.65
1999	708.48
2000	738
2001	770.94
2002	803.26
2003	839.39
2004	876.78
2005	913.61
2006	944.99
2007	965.36
2008	981.81
2009	999.39
2010	1007.44
2011	999.36
2012	998.9
2013	1006.24
2014	1015.24
2015	1027.86
2016	1038.28