Year	Number of
1990	3754.94
1991	3599.45
1992	3616.24
1993	3619.97
1994	3630.86
1995	3739.6
1996	3731.5
1997	3656.08
1998	3640.71
1999	3582.9
2000	3700.47
2001	3715.75
2002	3696.11
2003	3693.62
2004	3678.24
2005	3735.58
2006	3804.02
2007	3810.11
2008	3737.14
2009	3694.23
2010	3701.16
2011	3640.62
2012	3710.35
2013	3674.81
2014	3627.27
2015	3614.75
2016	3680.27