Year	Number of
1990	1133.78
1991	1180.23
1992	1228.79
1993	1278.07
1994	1339.48
1995	1408.31
1996	1466.38
1997	1528.79
1998	1594.22
1999	1654.05
2000	1713.31
2001	1764.85
2002	1814.51
2003	1864.19
2004	1911.15
2005	1957.17
2006	1998.39
2007	2041.39
2008	2090.93
2009	2145.04
2010	2198.53
2011	2242.4
2012	2285.37
2013	2332.11
2014	2379.1
2015	2425.42
2016	2466.56