Year	Number
1994	10.4122
1997	11.52765
1998	9.65963
1999	9.45671
2000	9.09197
2001	10.81139
2002	11.93287
2003	12.56847
2004	10.03875
2005	10.02108
2006	10.04757
2007	9.93432
2008	10.20534
2009	10.40291
2010	10.20815
2011	10.12842
2012	10.13401
2013	11.2015
2014	11.53472
2015	10.66445
2016	10.30027