Year	Number of
1990	938.57
1991	962.08
1992	985.83
1993	1007.88
1994	1030.29
1995	1056.12
1996	1080
1997	1104.68
1998	1128.96
1999	1154.79
2000	1180.28
2001	1191.52
2002	1201.75
2003	1211.26
2004	1222.73
2005	1238.83
2006	1264.39
2007	1288.55
2008	1311.96
2009	1334.71
2010	1358.34
2011	1372.07
2012	1385.27
2013	1397.63
2014	1410.99
2015	1422.73
2016	1437.52