Year	Number of
1990	373.67
1991	390.31
1992	409.58
1993	430.59
1994	452.06
1995	473.78
1996	491.32
1997	508.58
1998	525.82
1999	543.97
2000	564.11
2001	580.99
2002	599.63
2003	620.08
2004	641.95
2005	665.61
2006	682.28
2007	699.96
2008	719.62
2009	740.13
2010	761.75
2011	784.21
2012	807.7
2013	832.23
2014	858.7
2015	887.55
2016	918.75