Year	Number of
1990	1565.51
1991	1598.19
1992	1633.65
1993	1670.54
1994	1706.32
1995	1755.95
1996	1772.54
1997	1803.6
1998	1845.57
1999	1910.18
2000	1981.74
2001	2062.42
2002	2145.89
2003	2230.06
2004	2317.18
2005	2418.81
2006	2478.49
2007	2536.95
2008	2593.25
2009	2668.62
2010	2758.5
2011	2882.43
2012	3014.68
2013	3143.7
2014	3267.07
2015	3391.58
2016	3524.58