['year', 'data']
['1901', '8.16360092163086']
['1902', '7.798388481140137']
['1903', '8.02857780456543']
['1904', '8.073899269104004']
['1905', '8.185888290405273']
['1906', '8.227397918701172']
['1907', '7.890880584716797']
['1908', '8.411910057067871']
['1909', '7.723073482513428']
['1910', '8.213129043579102']
['1911', '8.806525230407715']
['1912', '8.186320304870605']
['1913', '8.606131553649902']
['1914', '8.704795837402344']
['1915', '7.876689910888672']
['1916', '8.219968795776367']
['1917', '7.619339942932129']
['1918', '8.362971305847168']
['1919', '7.616194725036621']
['1920', '8.549764633178711']
['1921', '9.234434127807617']
['1922', '7.76489782333374']
['1923', '8.064897537231445']
['1924', '8.252241134643555']
['1925', '8.16501522064209']
['1926', '8.70051097869873']
['1927', '8.16069221496582']
['1928', '8.444143295288086']
['1929', '8.107586860656738']
['1930', '8.407665252685547']
['1931', '8.10656452178955']
['1932', '8.4717378616333']
['1933', '8.85051155090332']
['1934', '8.948348999023438']
['1935', '8.544142723083496']
['1936', '8.468003273010254']
['1937', '8.46855354309082']
['1938', '8.889307975769043']
['1939', '8.704442024230957']
['1940', '8.12307357788086']
['1941', '8.003026962280273']
['1942', '8.055621147155762']
['1943', '8.885298728942871']
['1944', '8.494339942932129']
['1945', '9.205503463745117']
['1946', '8.440408706665039']
['1947', '8.36552619934082']
['1948', '8.883687019348145']
['1949', '9.365959167480469']
['1950', '8.405385971069336']
['1951', '8.138639450073242']
['1952', '8.068081855773926']
['1953', '9.009355545043945']
['1954', '8.162971496582031']
['1955', '8.26194953918457']
['1956', '7.9771223068237305']
['1957', '8.857429504394531']
['1958', '8.321069717407227']
['1959', '9.36658763885498']
['1960', '8.690408706665039']
['1961', '8.73176097869873']
['1962', '7.695125579833984']
['1963', '7.550864219665527']
['1964', '8.439268112182617']
['1965', '7.835102081298828']
['1966', '8.296226501464844']
['1967', '8.56753158569336']
['1968', '8.260298728942871']
['1969', '8.16340446472168']
['1970', '8.346855163574219']
['1971', '8.870872497558594']
['1972', '8.271894454956055']
['1973', '8.508294105529785']
['1974', '8.534119606018066']
['1975', '8.876848220825195']
['1976', '8.866470336914062']
['1977', '8.389740943908691']
['1978', '8.330581665039062']
['1979', '7.717060089111328']
['1980', '8.417374610900879']
['1981', '8.192609786987305']
['1982', '8.705266952514648']
['1983', '8.807822227478027']
['1984', '8.649764060974121']
['1985', '7.863011360168457']
['1986', '7.717177391052246']
['1987', '8.07802677154541']
['1988', '8.803970336914062']
['1989', '9.231642723083496']
['1990', '9.37519645690918']
['1991', '8.681564331054688']
['1992', '8.806879043579102']
['1993', '8.423270225524902']
['1994', '8.923505783081055']
['1995', '9.22822380065918']
['1996', '8.369221687316895']
['1997', '9.520047187805176']
['1998', '9.21104621887207']
['1999', '9.363954544067383']
['2000', '9.130817413330078']
['2001', '8.875746726989746']
['2002', '9.512499809265137']
['2003', '9.573152542114258']
['2004', '9.492963790893555']
['2005', '9.423820495605469']
['2006', '9.706446647644043']
['2007', '9.62161922454834']
['2008', '9.148781776428223']
['2009', '9.309747695922852']
['2010', '8.206398963928223']
['2011', '9.608891487121582']
['2012', '8.891592025756836']