Year	Number of
1990	352.38
1991	360.83
1992	378.31
1993	392.66
1994	423.96
1995	474.05
1996	475
1997	481.38
1998	481.7
1999	480.91
2000	491.26
2001	492.72
2002	496.26
2003	493.14
2004	497.1
2005	499.42
2006	507.28
2007	511.76
2008	516.96
2009	523.96
2010	540.68
2011	553.21
2012	561.24
2013	578.23
2014	596.71
2015	616.63
2016	637.28