Year	Number of
1990	508.22
1991	518.58
1992	529.5
1993	539.9
1994	557.45
1995	579.27
1996	601.66
1997	627.93
1998	657.54
1999	699.41
2000	741.11
2001	779.32
2002	813.59
2003	844.48
2004	871.33
2005	895.91
2006	917.46
2007	938.59
2008	961.13
2009	984.93
2010	1007
2011	1024.74
2012	1040.46
2013	1056.18
2014	1071.03
2015	1084.6
2016	1096.29