Year	Number of
1990	2265.22
1991	2432.99
1992	2547.86
1993	2701.8
1994	2850.69
1995	3000.78
1996	3067.02
1997	3174.27
1998	3216.95
1999	3360.21
2000	3287.76
2001	3288.18
2002	3255.81
2003	3381.63
2004	3307.87
2005	3308.22
2006	3285.78
2007	3154.05
2008	3058.08
2009	3409.55
2010	3514.8
2011	3645.96
2012	3709.93
2013	3919.3
2014	4032.24
2015	4169.8
2016	4325.08