“…The Ig values for the years 1848, 1858, 1868 and 1878 from Hacker (2003); Calculated by the present author: 1880,1890,1900,1910,1920,1930,1940,1950,1960,1970,1980,1990,2000,2006,2010 Coale and Demeny (1983); from 1782 to 1832, estimated using e0 provided by Andersen (1979) taking into account the Regional Model Life Tables "West" by Coale and Demeny (1983); from 1835 to 2008, HMD…”