Year	Number of
1990	2487.13
1991	2557.86
1992	2628.66
1993	2700.48
1994	2776.96
1995	2863.5
1996	2915.5
1997	2967.03
1998	3020.32
1999	3074.14
2000	3129.07
2001	3172.36
2002	3217.08
2003	3265.91
2004	3322.62
2005	3385.08
2006	3410.94
2007	3439.72
2008	3474.04
2009	3511.37
2010	3552.69
2011	3616.81
2012	3682.53
2013	3754.47
2014	3834.59
2015	3910.83
2016	3987.71