Year	Number of
1990	803.93
1991	815.9
1992	817.7
1993	830.63
1994	814.27
1995	803.95
1996	804.83
1997	805.54
1998	814.51
1999	817.19
2000	826.1
2001	808.74
2002	821.71
2003	822.69
2004	811
2005	796.3
2006	777.43
2007	760.63
2008	757.96
2009	743.33
2010	742.49
2011	742.04
2012	732.93
2013	721.63
2014	707.61
2015	702.04
2016	703.1