Year	Number of
1990	1221.18
1991	1264.3
1992	1306.7
1993	1367.61
1994	1436.1
1995	1500.9
1996	1521.21
1997	1561.61
1998	1593.13
1999	1649.49
2000	1701.53
2001	1766.7
2002	1829.55
2003	1871.96
2004	1942.65
2005	2006.65
2006	2050.6
2007	2080.58
2008	2123.16
2009	2167.65
2010	2229.74
2011	2288.03
2012	2324.54
2013	2340.16
2014	2325.63
2015	2305.91
2016	2297.07