Year	Years
1990	62.2
1991	62.4
1992	62.5
1993	62.7
1994	63
1995	63.2
1996	63.5
1997	63.7
1998	64
1999	64.3
2000	64.5
2001	64.8
2002	64.3
2003	65.3
2004	65.4
2005	65.6
2006	65.8
2007	65.9
2008	66.1
2009	66.2
2010	66.4
2011	66.5
2012	66.7
2013	66.8