Year	Number of
1990	563.52
1991	571.04
1992	561.31
1993	594.02
1994	604.1
1995	621.66
1996	620.96
1997	648.27
1998	667.61
1999	662.69
2000	687.95
2001	691.72
2002	708.55
2003	717.89
2004	734.34
2005	754.78
2006	762.97
2007	770.92
2008	779.13
2009	788.11
2010	798.62
2011	804.73
2012	810.95
2013	822.38
2014	832.16
2015	843.77
2016	856.05