Year	Number of
1990	498.04
1991	513.34
1992	522.61
1993	540.67
1994	549.58
1995	563.16
1996	569.34
1997	584.37
1998	605.56
1999	622.81
2000	645.29
2001	661.92
2002	694.84
2003	724.09
2004	751.26
2005	797.49
2006	818.72
2007	837.37
2008	857.03
2009	879.44
2010	900.72
2011	916.15
2012	927.36
2013	934.92
2014	936.58
2015	934.12
2016	936.85