Year	Number of
1990	1828.38
1991	1899.41
1992	1969.51
1993	1966.62
1994	1967.11
1995	1970.21
1996	1963.15
1997	1981.67
1998	2015.3
1999	2058.76
2000	2090.69
2001	2101.72
2002	2094.29
2003	2109.29
2004	2144.6
2005	2191.58
2006	2226
2007	2247.26
2008	2242.78
2009	2237.36
2010	2229.6
2011	2247.2
2012	2276.47
2013	2321.88
2014	2380
2015	2442.96
2016	2509.23