Year	Number of
1990	454.91
1991	454.89
1992	463.34
1993	471.37
1994	481.28
1995	490.99
1996	506.64
1997	525.47
1998	545.7
1999	565.79
2000	587.25
2001	606.01
2002	624.67
2003	646.35
2004	668.4
2005	694.19
2006	714.41
2007	734.51
2008	754.35
2009	772.79
2010	788.36
2011	791.06
2012	796.07
2013	800.32
2014	796.61
2015	793.38
2016	790.27