Year	Number of
1990	4948.38
1991	5052.59
1992	5143.96
1993	5201.24
1994	5255.09
1995	5338.87
1996	5490.01
1997	5645.5
1998	5727.21
1999	5801.02
2000	5823.26
2001	5869.36
2002	5920.26
2003	5954.13
2004	5993.28
2005	6022.12
2006	6162.41
2007	6296.68
2008	6402.29
2009	6559.13
2010	6687.26
2011	6757.43
2012	6836.33
2013	6980.42
2014	7027.83
2015	6980.51
2016	6960.2