Year	Years
1990	62.3
1991	62.4
1992	62.3
1993	62.3
1994	62.2
1995	62.1
1996	62.2
1997	62.2
1998	62.3
1999	62.5
2000	62.6
2001	62.7
2002	62.9
2003	63
2004	63.2
2005	62.6
2006	63.6
2007	63.8
2008	64.1
2009	64.4
2010	64.7
2011	65
2012	65.3
2013	65.7