Year	Number of
1990	2350.19
1991	2402.51
1992	2458.98
1993	2500.76
1994	2528.8
1995	2568.01
1996	2594.39
1997	2636.08
1998	2673.86
1999	2698.59
2000	2733.04
2001	2767.54
2002	2798.45
2003	2826.71
2004	2859.12
2005	2890.88
2006	2948.65
2007	3005.1
2008	3054.07
2009	3103.12
2010	3173.35
2011	3257.97
2012	3316.72
2013	3350.69
2014	3390.18
2015	3447.81
2016	3519.25