Year	Number of
1990	599.89
1991	610.35
1992	621.32
1993	633.91
1994	647.41
1995	662.68
1996	677.83
1997	695.27
1998	714.04
1999	734.14
2000	756.24
2001	779.06
2002	805.16
2003	832.18
2004	857.41
2005	885.07
2006	903.09
2007	922.41
2008	944.83
2009	968.97
2010	999.09
2011	1031.6
2012	1069.08
2013	1106.58
2014	1147.37
2015	1193.14
2016	1239.87