Year	Number
1995	10
1996	9.95
1997	9.9
1998	9.85
1999	9.8
2000	9.75
2001	9.7
2002	9.4174444444
2003	9.3342222222
2004	9.251
2005	9.5
2006	9.3
2007	9.1
2008	8.9
2009	8.7
2010	8.5
2011	8.3
2012	8.1
2013	7.9
2014	7.9
2015	7.9
2016	7.9
2017	7.9
2018	7.9
2019	7.9
2020	7.9