Year	Years
1990	55.8
1991	56.3
1992	56.7
1993	57.2
1994	57.6
1995	57.9
1996	58.2
1997	58.5
1998	58.8
1999	59.1
2000	59.5
2001	60
2002	60.5
2003	61.1
2004	61.6
2005	62.1
2006	62.6
2007	63.2
2008	63.8
2009	64.3
2010	64.8
2011	65.2
2012	65.5
2013	65.8