Year	Years
1970	0.1
1971	0.1
1972	0.1
1973	0.1
1974	0.1
1975	0.2
1976	0.2
1977	0.2
1978	0.2
1979	0.2
1980	0.2
1981	0.2
1982	0.2
1983	0.3
1984	0.3
1985	0.3
1986	0.3
1987	0.3
1988	0.4
1989	0.4
1990	0.4
1991	0.5
1992	0.5
1993	0.5
1994	0.6
1995	0.6
1996	0.6
1997	0.7
1998	0.7
1999	0.8
2000	0.8
2001	0.9
2002	0.9
2003	1
2004	1
2005	1.1
2006	1.1
2007	1.2
2008	1.3
2009	1.3