{"Date":"1860-01-01","Average":177.285}
{"Date":"1861-01-01","Average":177.077}
{"Date":"1862-01-01","Average":177.227}
{"Date":"1863-01-01","Average":177.166}
{"Date":"1864-01-01","Average":177.032}
{"Date":"1865-01-01","Average":176.684}
{"Date":"1866-01-01","Average":176.657}
{"Date":"1867-01-01","Average":176.782}
{"Date":"1868-01-01","Average":176.647}
{"Date":"1869-01-01","Average":176.587}
{"Date":"1870-01-01","Average":176.849}
{"Date":"1871-01-01","Average":176.986}
{"Date":"1872-01-01","Average":176.614}
{"Date":"1873-01-01","Average":176.556}
{"Date":"1874-01-01","Average":176.955}
{"Date":"1875-01-01","Average":176.803}
{"Date":"1876-01-01","Average":176.98}
{"Date":"1877-01-01","Average":177.199}
{"Date":"1878-01-01","Average":177.077}
{"Date":"1879-01-01","Average":176.916}
{"Date":"1880-01-01","Average":176.769}
{"Date":"1881-01-01","Average":176.803}
{"Date":"1882-01-01","Average":177.044}
{"Date":"1883-01-01","Average":176.98}
{"Date":"1884-01-01","Average":177.23}
{"Date":"1885-01-01","Average":177.202}
{"Date":"1886-01-01","Average":177.263}
{"Date":"1887-01-01","Average":177.138}
{"Date":"1888-01-01","Average":176.858}
{"Date":"1889-01-01","Average":176.83}
{"Date":"1890-01-01","Average":176.687}
{"Date":"1891-01-01","Average":176.611}
{"Date":"1892-01-01","Average":176.428}
{"Date":"1893-01-01","Average":176.401}
{"Date":"1894-01-01","Average":176.519}
{"Date":"1895-01-01","Average":176.462}
{"Date":"1896-01-01","Average":176.193}
{"Date":"1897-01-01","Average":176.303}
{"Date":"1898-01-01","Average":176.367}
{"Date":"1899-01-01","Average":176.373}
{"Date":"1900-01-01","Average":176.416}
{"Date":"1901-01-01","Average":176.538}
{"Date":"1902-01-01","Average":176.465}
{"Date":"1903-01-01","Average":176.385}
{"Date":"1904-01-01","Average":176.437}
{"Date":"1905-01-01","Average":176.58}
{"Date":"1906-01-01","Average":176.629}
{"Date":"1907-01-01","Average":176.663}
{"Date":"1908-01-01","Average":176.623}
{"Date":"1909-01-01","Average":176.434}
{"Date":"1910-01-01","Average":176.462}
{"Date":"1911-01-01","Average":176.276}
{"Date":"1912-01-01","Average":176.263}
{"Date":"1913-01-01","Average":176.504}
{"Date":"1914-01-01","Average":176.486}
{"Date":"1915-01-01","Average":176.291}
{"Date":"1916-01-01","Average":176.245}
{"Date":"1917-01-01","Average":176.611}
{"Date":"1918-01-01","Average":176.684}
{"Date":"1919-01-01","Average":176.711}
{"Date":"1920-01-01","Average":176.483}
{"Date":"1921-01-01","Average":176.44}
{"Date":"1922-01-01","Average":176.257}
{"Date":"1923-01-01","Average":176.132}
{"Date":"1924-01-01","Average":176.044}
{"Date":"1925-01-01","Average":175.898}
{"Date":"1926-01-01","Average":175.675}
{"Date":"1927-01-01","Average":175.913}
{"Date":"1928-01-01","Average":176.108}
{"Date":"1929-01-01","Average":176.647}
{"Date":"1930-01-01","Average":176.641}
{"Date":"1931-01-01","Average":176.206}
{"Date":"1932-01-01","Average":175.91}
{"Date":"1933-01-01","Average":175.715}
{"Date":"1934-01-01","Average":175.69}
{"Date":"1935-01-01","Average":175.733}
{"Date":"1936-01-01","Average":175.828}
{"Date":"1937-01-01","Average":175.803}
{"Date":"1938-01-01","Average":175.73}
{"Date":"1939-01-01","Average":176.065}
{"Date":"1940-01-01","Average":176.09}
{"Date":"1941-01-01","Average":176.068}
{"Date":"1942-01-01","Average":176.12}
{"Date":"1943-01-01","Average":176.248}
{"Date":"1944-01-01","Average":176.565}
{"Date":"1945-01-01","Average":176.37}
{"Date":"1946-01-01","Average":176.562}
{"Date":"1947-01-01","Average":176.291}
{"Date":"1948-01-01","Average":176.477}
{"Date":"1949-01-01","Average":176.19}
{"Date":"1950-01-01","Average":175.962}
{"Date":"1951-01-01","Average":176.337}
{"Date":"1952-01-01","Average":176.94}
{"Date":"1953-01-01","Average":176.855}
{"Date":"1954-01-01","Average":176.632}
{"Date":"1955-01-01","Average":176.83}
{"Date":"1956-01-01","Average":176.324}
{"Date":"1957-01-01","Average":176.233}
{"Date":"1958-01-01","Average":176.169}
{"Date":"1959-01-01","Average":175.779}
{"Date":"1960-01-01","Average":176.148}
{"Date":"1961-01-01","Average":176.382}
{"Date":"1962-01-01","Average":176.187}
{"Date":"1963-01-01","Average":175.885}
{"Date":"1964-01-01","Average":175.626}
{"Date":"1965-01-01","Average":175.593}
{"Date":"1966-01-01","Average":176.114}
{"Date":"1967-01-01","Average":176.05}
{"Date":"1968-01-01","Average":176.279}
{"Date":"1969-01-01","Average":176.468}
{"Date":"1970-01-01","Average":176.58}
{"Date":"1971-01-01","Average":176.637}
{"Date":"1972-01-01","Average":176.735}
{"Date":"1973-01-01","Average":176.973}
{"Date":"1974-01-01","Average":176.938}
{"Date":"1975-01-01","Average":176.862}
{"Date":"1976-01-01","Average":176.76}
{"Date":"1977-01-01","Average":176.446}
{"Date":"1978-01-01","Average":176.504}
{"Date":"1979-01-01","Average":176.521}
{"Date":"1980-01-01","Average":176.779}
{"Date":"1981-01-01","Average":176.595}
{"Date":"1982-01-01","Average":176.519}
{"Date":"1983-01-01","Average":176.667}
{"Date":"1984-01-01","Average":176.699}
{"Date":"1985-01-01","Average":176.903}
{"Date":"1986-01-01","Average":177.148}
{"Date":"1987-01-01","Average":177.195}
{"Date":"1988-01-01","Average":176.624}
{"Date":"1989-01-01","Average":176.371}
{"Date":"1990-01-01","Average":176.15}
{"Date":"1991-01-01","Average":176.361}
{"Date":"1992-01-01","Average":176.395}
{"Date":"1993-01-01","Average":176.549}
{"Date":"1994-01-01","Average":176.573}
{"Date":"1995-01-01","Average":176.545}
{"Date":"1996-01-01","Average":176.377}
{"Date":"1997-01-01","Average":176.801}
{"Date":"1998-01-01","Average":176.735}
{"Date":"1999-01-01","Average":176.26}
{"Date":"2000-01-01","Average":175.928}
{"Date":"2001-01-01","Average":175.774}
{"Date":"2002-01-01","Average":175.997}
{"Date":"2003-01-01","Average":175.858}
{"Date":"2004-01-01","Average":175.912}
{"Date":"2005-01-01","Average":176.098}
{"Date":"2006-01-01","Average":175.878}
{"Date":"2007-01-01","Average":176.015}
{"Date":"2008-01-01","Average":175.705}
{"Date":"2009-01-01","Average":176.024}
{"Date":"2010-01-01","Average":176.179}
{"Date":"2011-01-01","Average":175.833}
{"Date":"2012-01-01","Average":176.01}
{"Date":"2013-01-01","Average":175.592}
{"Date":"2014-01-01","Average":175.965}