Year	Number of
1990	4171.22
1991	4300.65
1992	4247.46
1993	4184.31
1994	4206.43
1995	4218.81
1996	4195.33
1997	4276.29
1998	4213.18
1999	4181.49
2000	4119.28
2001	4018.98
2002	3919.83
2003	3861.43
2004	3829.09
2005	3820.88
2006	3806.82
2007	3784.7
2008	3686.15
2009	3633.83
2010	3476.43
2011	3416.74
2012	3399.33
2013	3310.54
2014	3205.27
2015	3160.69
2016	3120.33