Year	Number of
1990	225.98
1991	238.61
1992	250.73
1993	263.95
1994	278.11
1995	293.05
1996	309.04
1997	324.31
1998	343.07
1999	362.27
2000	378.42
2001	398.31
2002	422.48
2003	448.56
2004	478.43
2005	512.8
2006	535.82
2007	561.45
2008	588.12
2009	620.26
2010	660.85
2011	670.44
2012	689.1
2013	699.79
2014	725.29
2015	763.91
2016	810.17