Year	Number of
1990	777.28
1991	800.6
1992	826.72
1993	855.26
1994	885.55
1995	917.91
1996	947.5
1997	978.15
1998	1010.68
1999	1045.75
2000	1084.5
2001	1130.09
2002	1179.7
2003	1233.45
2004	1290.82
2005	1352.77
2006	1405.19
2007	1461.26
2008	1522.43
2009	1587.38
2010	1657.19
2011	1695.84
2012	1735.33
2013	1774.5
2014	1818.78
2015	1869.74
2016	1917.66