Year	Number of
1990	2742.96
1991	2824.97
1992	2905.73
1993	2985.73
1994	3069.15
1995	3167.62
1996	3245.87
1997	3324.08
1998	3403.33
1999	3483.14
2000	3570.42
2001	3637.01
2002	3700.65
2003	3762.76
2004	3832.63
2005	3915.57
2006	3979.22
2007	4039.01
2008	4098.91
2009	4160.34
2010	4226.66
2011	4282.3
2012	4341.04
2013	4412.75
2014	4487.36
2015	4564.92
2016	4648.8