Year	Number of
1990	1325.94
1991	1358.35
1992	1397.3
1993	1433.19
1994	1473.42
1995	1515.84
1996	1583.37
1997	1648.19
1998	1717.33
1999	1781.68
2000	1844.36
2001	1907.55
2002	1973.01
2003	2057.51
2004	2144.05
2005	2233.58
2006	2310.1
2007	2391.92
2008	2484.9
2009	2588.39
2010	2703.02
2011	2743.38
2012	2785.35
2013	2820.96
2014	2864.18
2015	2916.81
2016	2974.74