Year	Number of
1990	1410.74
1991	1431.65
1992	1451.76
1993	1478.24
1994	1510.04
1995	1541.44
1996	1577.84
1997	1613.28
1998	1648.97
1999	1687.57
2000	1727.02
2001	1766.44
2002	1806.39
2003	1847.97
2004	1893.56
2005	1940.84
2006	1974.1
2007	2005.96
2008	2039.13
2009	2075.55
2010	2112.97
2011	2126.62
2012	2140.83
2013	2155.27
2014	2169.93
2015	2184.76
2016	2200.55