Year	Number
1994	10.99869
1995	11.03682
1996	11.00527
1997	11.02591
1998	11.07973
1999	11.10609
2000	11.16249
2001	11.27828
2002	11.34348
2003	11.39143
2004	11.33057
2005	11.29529
2006	11.04547
2007	10.88614
2008	10.7537
2009	10.72109
2010	10.83323
2011	10.89878
2012	10.75538
2013	11.15565
2014	10.97322
2015	10.77056
2016	10.54213
2017	10.4964
2018	10.48524