Year	Years
1990	58.1
1991	58.3
1992	58.5
1993	58.6
1994	58.7
1995	58.8
1996	59
1997	59
1998	59.2
1999	59.6
2000	60
2001	60.6
2002	61.1
2003	61.7
2004	62.3
2005	62.8
2006	63.4
2007	63.9
2008	64.3
2009	64.7
2010	65
2011	65.2
2012	65.5
2013	65.7