Year	Number of
1990	2587.83
1991	2689.31
1992	2788.5
1993	2905.69
1994	3064.11
1995	3273.89
1996	3438.81
1997	3633
1998	3847.32
1999	4074.99
2000	4318.33
2001	4509
2002	4710.77
2003	4927.25
2004	5152.04
2005	5389.85
2006	5589.53
2007	5793.6
2008	5976.76
2009	6328.33
2010	6611.43
2011	6945.85
2012	7346.08
2013	7779.33
2014	8244.44
2015	8759.96
2016	9301.49