Year	Number of
1990	835.02
1991	835.08
1992	837.38
1993	842.6
1994	832.55
1995	841.44
1996	843.1
1997	842.04
1998	844.17
1999	843.79
2000	849.58
2001	860.93
2002	826.99
2003	813.93
2004	799.61
2005	809.23
2006	798.94
2007	787.84
2008	779.71
2009	773.79
2010	750.4
2011	736.01
2012	713.63
2013	693.51
2014	681.44
2015	678.33
2016	674.48