Year	Age
1970	0.4
1971	0.4
1972	0.4
1973	0.4
1974	0.5
1975	0.5
1976	0.5
1977	0.5
1978	0.6
1979	0.6
1980	0.7
1981	0.7
1982	0.8
1983	0.8
1984	0.9
1985	1
1986	1
1987	1.1
1988	1.2
1989	1.3
1990	1.3
1991	1.4
1992	1.5
1993	1.6
1994	1.7
1995	1.8
1996	1.9
1997	2
1998	2.1
1999	2.2
2000	2.3
2001	2.4
2002	2.5
2003	2.6
2004	2.7
2005	2.8
2006	2.9
2007	3
2008	3.2
2009	3.3