Year	Number of
1990	4053.15
1991	4205.02
1992	4343.25
1993	4479.9
1994	4603.03
1995	4722.26
1996	4769.68
1997	4818.14
1998	4870.57
1999	4915.5
2000	4966.28
2001	5018.78
2002	5082.97
2003	5164.28
2004	5261.32
2005	5372.05
2006	5427.55
2007	5490.27
2008	5562
2009	5634.15
2010	5710.35
2011	5754.99
2012	5803.6
2013	5853.96
2014	5905.21
2015	5959.73
2016	6001.62