Year	Number of
1990	2029.49
1991	2069.16
1992	2083.75
1993	2097.37
1994	2109.55
1995	2084.83
1996	2128.64
1997	2133.25
1998	2149.45
1999	2127.41
2000	2104.25
2001	2101.81
2002	2086.74
2003	2066.61
2004	2066.08
2005	2097.64
2006	2141.09
2007	2192.22
2008	2214.19
2009	2223.25
2010	2227.74
2011	2245.78
2012	2259.5
2013	2281
2014	2329.97
2015	2400.09
2016	2441.27