Year	Number of
1990	1811.71
1991	1861.04
1992	1915.14
1993	1973.8
1994	2035.42
1995	2101.15
1996	2151.06
1997	2204.13
1998	2260.15
1999	2320.37
2000	2386.36
2001	2446.59
2002	2513.45
2003	2585.69
2004	2662.44
2005	2744.75
2006	2819.69
2007	2895.08
2008	2976.66
2009	3065.63
2010	3165.25
2011	3244.18
2012	3334.77
2013	3434.2
2014	3541.12
2015	3655.05
2016	3769.8