Year	Number of
1990	378.13
1991	409.21
1992	440.38
1993	473.14
1994	510.18
1995	539.87
1996	558.47
1997	572.17
1998	582.31
1999	593.22
2000	604.02
2001	607.83
2002	599.03
2003	588.39
2004	586.99
2005	579.18
2006	582.04
2007	586.08
2008	593.78
2009	590
2010	590.39
2011	597.62
2012	608.49
2013	618.83
2014	635.89
2015	671.67
2016	700.58