Year	Number of
1990	3051.81
1991	3172.76
1992	3294.66
1993	3470.11
1994	3589.35
1995	3786.51
1996	4003.12
1997	4200.63
1998	4454.5
1999	4734.01
2000	5023.39
2001	5352.04
2002	5715.53
2003	6041.49
2004	6464.04
2005	6865.42
2006	7268.13
2007	7724.25
2008	8215.61
2009	8698.9
2010	9270.19
2011	9551.62
2012	9817.4
2013	9928.17
2014	9776.17
2015	9752.16
2016	9757.53