Year	Number of
1990	5337.44
1991	5538.33
1992	5707.09
1993	5844.09
1994	5892.8
1995	5935.24
1996	6001.98
1997	6008.15
1998	5999.55
1999	5969.86
2000	5978.23
2001	5991.04
2002	5999.67
2003	6075.49
2004	6133.49
2005	6127.87
2006	6154.22
2007	6178.6
2008	6148.91
2009	6087.47
2010	5979.92
2011	5822.23
2012	5695.04
2013	5528.66
2014	5444.75
2015	5377.08
2016	5308.76