Year	Number of
1990	968.13
1991	982.88
1992	1005.5
1993	1018.89
1994	1031.95
1995	1048.75
1996	1058.84
1997	1063.14
1998	1078.6
1999	1103.55
2000	1116.05
2001	1139.87
2002	1167.43
2003	1185.53
2004	1225.29
2005	1238.12
2006	1259.87
2007	1268.99
2008	1287.92
2009	1300.21
2010	1297.56
2011	1305.29
2012	1309.28
2013	1320.57
2014	1332.53
2015	1369.11
2016	1404.17