Year	Years
1990	67.9
1991	68.2
1992	68.4
1993	68.6
1994	68.8
1995	62.4
1996	62.6
1997	62.7
1998	62.8
1999	63
2000	63.2
2001	63.3
2002	63.5
2003	69.8
2004	69.9
2005	70.1
2006	70.2
2007	70.3
2008	70.6
2009	70.7
2010	70.8
2011	71
2012	71.1
2013	71.2