Year	Number of
1990	651.44
1991	666.8
1992	669.44
1993	682.83
1994	693.46
1995	711.31
1996	715
1997	739.99
1998	749.06
1999	762.92
2000	764.24
2001	773.64
2002	770.11
2003	776.35
2004	786.6
2005	795.34
2006	804.73
2007	818.1
2008	808.42
2009	818.79
2010	812.37
2011	824.3
2012	834.89
2013	844.92
2014	842.21
2015	852.73
2016	866.07