Year	Years
1990	71
1991	72.4
1992	72.9
1993	73.2
1994	72.9
1995	72.3
1996	71.8
1997	71.8
1998	72.2
1999	72.3
2000	72.4
2001	72.9
2002	73.5
2003	73.9
2004	73.7
2005	74.2
2006	74.4
2007	75.1
2008	74.3
2009	74.5
2010	75.7
2011	75.8
2012	75.9
2013	76.1