Year	Number of
1990	524.98
1991	537.8
1992	554.76
1993	571.86
1994	596.27
1995	618.09
1996	635.3
1997	669.46
1998	698.53
1999	722.36
2000	752.63
2001	761.2
2002	776.31
2003	787.94
2004	804.61
2005	828.08
2006	836.88
2007	851.15
2008	864.2
2009	879.4
2010	907.59
2011	933.36
2012	959.37
2013	989.27
2014	1016.73
2015	1047.8
2016	1077.05