Year	Number of
1990	679.56
1991	692.12
1992	719.94
1993	742.69
1994	766.4
1995	798.27
1996	804.76
1997	829.35
1998	851.58
1999	873.74
2000	904.93
2001	933.7
2002	949.53
2003	966.15
2004	987.46
2005	1005.64
2006	1032.71
2007	1054.99
2008	1078.86
2009	1105.92
2010	1131.77
2011	1164.94
2012	1201.24
2013	1239.68
2014	1279.63
2015	1325.28
2016	1371.37