Year	Number of
1990	714.78
1991	736.23
1992	775.22
1993	839.52
1994	955.96
1995	1024.53
1996	1080.52
1997	1123.09
1998	1141.67
1999	1147.07
2000	1133.23
2001	1135.61
2002	1134.62
2003	1120.95
2004	1124.23
2005	1123.6
2006	1122.26
2007	1104.1
2008	1088.77
2009	1079.38
2010	1069.59
2011	1056.99
2012	1042.34
2013	1033.03
2014	1027.99
2015	1029.26
2016	1033.42