Year	Number of
1990	2087.36
1991	2133.86
1992	2171.77
1993	2222.47
1994	2235.4
1995	2284.93
1996	2366.37
1997	2403.39
1998	2442.78
1999	2465.29
2000	2490.61
2001	2536.6
2002	2618.16
2003	2669.49
2004	2686.1
2005	2706
2006	2755.2
2007	2808.43
2008	2865.42
2009	2937.56
2010	2997.65
2011	3035.55
2012	3127.79
2013	3187.03
2014	3229.94
2015	3299.58
2016	3397.9