Year	Number of
1990	395.61
1991	409.6
1992	429.78
1993	457.5
1994	484.74
1995	508.48
1996	538.94
1997	579.24
1998	614.28
1999	635.98
2000	652.82
2001	665.72
2002	675.49
2003	682.61
2004	691.64
2005	701.15
2006	727.17
2007	740.93
2008	757.79
2009	777.27
2010	786.12
2011	787.44
2012	789.64
2013	791.17
2014	792.4
2015	794.17
2016	796.88