Year	Years
1990	68
1991	68.3
1992	68.6
1993	68.9
1994	69.3
1995	69.6
1996	69.9
1997	70.3
1998	70.7
1999	71.1
2000	71.5
2001	71.9
2002	72.4
2003	72.9
2004	73.4
2005	73.9
2006	74.4
2007	74.9
2008	75.1
2009	75.6
2010	75.9
2011	76.1
2012	76.3
2013	76.5