Year	Number of
1990	569.55
1991	593.08
1992	615.88
1993	626
1994	662.57
1995	683.43
1996	709.73
1997	736.62
1998	763
1999	804.47
2000	833.22
2001	874.77
2002	944.54
2003	979.67
2004	1009.68
2005	1063.83
2006	1116.23
2007	1175
2008	1248.83
2009	1299.48
2010	1347.36
2011	1413.82
2012	1486.11
2013	1563.87
2014	1637.63
2015	1714.45
2016	1790.64