Year	Number
1994	10.37073
1997	9.69197
1998	10.86621
1999	10.69419
2000	10.7072
2001	10.54677
2002	9.96177
2003	9.67183
2004	9.68084
2005	9.8656
2006	9.67642
2007	9.73123
2008	10.2423
2009	10.24782
2010	10.18103
2011	9.91273
2012	9.92891
2013	9.68106
2014	10.22135
2015	9.89494
2016	9.72384