Year	Number of
1990	692.76
1991	720.4
1992	748.48
1993	778.86
1994	810.09
1995	840.07
1996	873.98
1997	907.83
1998	946.51
1999	991.86
2000	1039.35
2001	1084.71
2002	1129.33
2003	1173.55
2004	1214.3
2005	1253.6
2006	1290.64
2007	1329.52
2008	1371.15
2009	1416.02
2010	1461.09
2011	1505.48
2012	1550.95
2013	1591.45
2014	1636.53
2015	1685.57
2016	1756.36