Year	Number of
1990	2523.6
1991	2564.64
1992	2644.92
1993	2710.66
1994	2755.37
1995	2796.76
1996	2833.18
1997	2890.48
1998	2969.49
1999	2977.85
2000	2988.59
2001	2989.58
2002	3073.43
2003	3152.73
2004	3163.81
2005	3263.96
2006	3275.39
2007	3300.12
2008	3492.55
2009	3588.65
2010	3673.83
2011	3680.02
2012	3723.95
2013	3879.05
2014	3943.28
2015	3992.53
2016	4102.09