Year	Number of
1990	668.53
1991	691.82
1992	716.44
1993	742.76
1994	769.81
1995	798.06
1996	826.25
1997	856.31
1998	887.35
1999	919.9
2000	954.6
2001	971.9
2002	991.77
2003	1014.55
2004	1039.85
2005	1068.47
2006	1097.74
2007	1127.96
2008	1160.09
2009	1194.23
2010	1231.33
2011	1266.36
2012	1304.74
2013	1342.73
2014	1383.82
2015	1428.19
2016	1474.9