Year	Men	Women
1890	26.1	22
1900	25.9	21.9
1910	25.1	21.6
1920	24.6	21.2
1930	24.3	21.3
1940	24.3	21.5
1947	23.7	20.5
1948	23.3	20.4
1949	22.7	20.3
1950	22.8	20.3
1951	22.9	20.4
1952	23	20.2
1953	22.8	20.2
1954	23	20.3
1955	22.6	20.2
1956	22.5	20.1
1957	22.6	20.3
1958	22.6	20.2
1959	22.5	20.2
1960	22.8	20.3
1961	22.8	20.3
1962	22.7	20.3
1963	22.8	20.5
1964	23.1	20.5
1965	22.8	20.6
1966	22.8	20.5
1967	23.1	20.6
1968	23.1	20.8
1969	23.2	20.8
1970	23.2	20.8
1971	23.1	20.9
1972	23.3	20.9
1973	23.2	21
1974	23.1	21.1
1975	23.5	21.1
1976	23.8	21.3
1977	24	21.6
1978	24.2	21.8
1979	24.4	22.1
1980	24.7	22
1981	24.8	22.3
1982	25.2	22.5
1983	25.4	22.8
1984	25.4	23
1985	25.5	23.3
1986	25.7	23.1
1987	25.8	23.6
1988	25.9	23.6
1989	26.2	23.8
1990	26.1	23.9
1991	26.3	24.1
1992	26.5	24.4
1993	26.5	24.5
1994	26.7	24.5
1995	26.9	24.5
1996	27.1	24.8
1997	26.8	25
1998	26.7	25
1999	26.9	25.1
2000	26.8	25.1
2001	26.9	25.1
2002	26.9	25.3
2003	27.1	25.3
2004	27.4	25.3
2005	27.0	25.5
2006	27.5	25.9
2007	27.7	26.0
2008	28.0	26.2
2009	28.4	26.5
2010	28.7	26.7
2011	28.9	26.9
2012	29.1	27.1
2013	29.4	27.4
2014	29.5	27.6
2015	29.7	27.8