Year	Number of
1990	742.65
1991	770.97
1992	798.94
1993	827.29
1994	856.78
1995	888.34
1996	912.63
1997	939.25
1998	967.81
1999	997.44
2000	1028.3
2001	1053.03
2002	1078.62
2003	1106.44
2004	1135.64
2005	1167.12
2006	1187.14
2007	1207.96
2008	1232.14
2009	1257.5
2010	1284.15
2011	1307.33
2012	1331.34
2013	1356.52
2014	1382.16
2015	1408.21
2016	1434.39