Year	Number of
1990	345.84
1991	357.55
1992	371.72
1993	386.7
1994	400.51
1995	414.26
1996	425.97
1997	431.48
1998	440.79
1999	463.18
2000	480.02
2001	494.12
2002	510.26
2003	528.5
2004	550.65
2005	568.19
2006	589.5
2007	610.23
2008	634.05
2009	657.73
2010	679.95
2011	705.98
2012	720.92
2013	736.38
2014	745.16
2015	741.41
2016	743.01