Year	Number of
1990	457.52
1991	467.94
1992	480.49
1993	500.92
1994	523.17
1995	541.09
1996	554.53
1997	565.8
1998	581.57
1999	603.04
2000	624.77
2001	643.36
2002	660.96
2003	675.22
2004	689.02
2005	697.74
2006	701.69
2007	706.34
2008	712.28
2009	723.48
2010	740.61
2011	747.17
2012	753.76
2013	761.91
2014	772
2015	783.25
2016	793.66