Year	Number of
1990	1080.77
1991	1088.6
1992	1085.87
1993	1087.57
1994	1074.66
1995	1023.72
1996	1024.11
1997	998.12
1998	997.87
1999	1015.16
2000	1006.01
2001	1017.13
2002	1027.1
2003	1047.81
2004	1028.01
2005	980.83
2006	1002.55
2007	996.93
2008	1004.38
2009	1008.27
2010	1007.46
2011	1014.46
2012	1011.27
2013	988.54
2014	980.81
2015	974.32
2016	990.3