Year	Age
1616	25.6
1666	26.6
1716	25.3
1766	23.5
1791	22.6
1840	24.3
1866	24.6
1925	25.64
1930	26.12
1935	25.67
1940	25.09
1945	24.08
1948	24.17
1949	24
1950	23.93
1951	23.78
1952	23.7
1958	22.76
1968	22.17
1971	22.35
1980	22.98
1989	24.79
2005	29.75