Year	Number of
1990	504.34
1991	524.44
1992	546.31
1993	573.84
1994	592.23
1995	610.19
1996	628.33
1997	637.17
1998	639.56
1999	651.96
2000	625.97
2001	610.16
2002	599.03
2003	595.85
2004	599.58
2005	605.98
2006	619.41
2007	623.73
2008	633.88
2009	643.5
2010	651.71
2011	657.61
2012	672.17
2013	686.05
2014	698.98
2015	714.04
2016	730.62