Year	Number of
1990	692.12
1991	718.93
1992	746.33
1993	774.71
1994	804.56
1995	837.25
1996	859.54
1997	883.81
1998	909.58
1999	936.7
2000	966.01
2001	985.65
2002	1006.93
2003	1029.19
2004	1052.07
2005	1076.84
2006	1104.68
2007	1133.33
2008	1165.43
2009	1200.52
2010	1240.08
2011	1275.64
2012	1315.04
2013	1356.13
2014	1400.94
2015	1449.57
2016	1500.71