Year	Age
1970	0.3
1971	0.3
1972	0.3
1973	0.3
1974	0.3
1975	0.4
1976	0.4
1977	0.4
1978	0.5
1979	0.5
1980	0.5
1981	0.6
1982	0.6
1983	0.7
1984	0.7
1985	0.8
1986	0.8
1987	0.9
1988	1
1989	1
1990	1.1
1991	1.2
1992	1.3
1993	1.4
1994	1.5
1995	1.6
1996	1.6
1997	1.7
1998	1.9
1999	2
2000	2.1
2001	2.2
2002	2.3
2003	2.4
2004	2.5
2005	2.7
2006	2.8
2007	2.9
2008	3
2009	3.2