Year	Number of
1990	285.12
1991	297.09
1992	313.34
1993	332.67
1994	357.67
1995	389.82
1996	429.01
1997	473.51
1998	518.49
1999	550.84
2000	575.93
2001	591.48
2002	610.84
2003	621.69
2004	623.74
2005	620.44
2006	639.51
2007	655.08
2008	670.89
2009	688.82
2010	701.02
2011	718.09
2012	733.35
2013	747.55
2014	762.28
2015	777.08
2016	794.15