Year	Years
1990	69.1
1991	69.5
1992	69.8
1993	70.1
1994	70.5
1995	70.8
1996	71.1
1997	71.4
1998	71.9
1999	72.2
2000	72.6
2001	73.1
2002	73.5
2003	73.9
2004	74.3
2005	74.6
2006	75
2007	75.2
2008	75.4
2009	75.6
2010	75.8
2011	76
2012	76.2
2013	76.3