Year	Number of
1990	534.09
1991	559.99
1992	590.18
1993	623.31
1994	657.53
1995	693.03
1996	716.95
1997	740.68
1998	764.1
1999	788.6
2000	816.14
2001	835.29
2002	856.89
2003	880.59
2004	905.84
2005	934.08
2006	965.43
2007	997.67
2008	1034.03
2009	1072.16
2010	1113.33
2011	1143.66
2012	1176.15
2013	1209.71
2014	1245.96
2015	1285.56
2016	1329.88