Year	Number of
1990	1653.88
1991	1689.83
1992	1752.65
1993	1812.15
1994	1876.36
1995	1938.17
1996	1975.41
1997	2035.46
1998	2065.7
1999	2081.59
2000	2090.12
2001	2113.6
2002	2170.49
2003	2226.9
2004	2260.99
2005	2322.11
2006	2328.23
2007	2336.73
2008	2392.46
2009	2462.97
2010	2473.42
2011	2517.42
2012	2583.23
2013	2720.21
2014	2823.8
2015	2896.34
2016	3031.25