Year	Number of
1990	769.84
1991	779.68
1992	793.59
1993	820.05
1994	819.54
1995	836.96
1996	835.98
1997	844.49
1998	843.72
1999	848
2000	854.75
2001	860.33
2002	863.11
2003	862.28
2004	849.57
2005	846.69
2006	851.23
2007	851.86
2008	849.43
2009	850.19
2010	848.3
2011	846.21
2012	845.4
2013	840.37
2014	829.64
2015	833.12
2016	842.87