Year	Number of
1990	565.64
1991	590.62
1992	612.44
1993	620.81
1994	660.35
1995	683.58
1996	711.56
1997	737.29
1998	762.44
1999	804.47
2000	829.06
2001	871.62
2002	949.55
2003	984.83
2004	1008.04
2005	1060.99
2006	1114.06
2007	1171.44
2008	1247.76
2009	1297.45
2010	1342.63
2011	1409.6
2012	1479
2013	1553.88
2014	1620.02
2015	1691.64
2016	1764.27