Year	Years
1990	67.3
1991	67.6
1992	67.9
1993	68.3
1994	68.6
1995	69
1996	69.4
1997	69.8
1998	70.4
1999	70.3
2000	71.5
2001	72
2002	72.5
2003	72.9
2004	73.4
2005	73.8
2006	74.3
2007	74.7
2008	75.1
2009	75.4
2010	75.7
2011	76
2012	76.2
2013	76.3