1981 dTs
year
year 1981_digitized
1880  -.28
1881  -.34
1882  -.36
1883  -.38
1884  -.38
1885  -.39
1886  -.34
1887  -.28
1888  -.29
1889  -.29
1890  -.29
1891  -.32
1892  -.34
1893  -.32
1894  -.29
1895  -.24
1896  -.23
1897  -.24
1898  -.16
1899  -.14
1900  -.17
1901  -.16
1902  -.22
1903  -.27
1904  -.3
1905  -.31
1906  -.29
1907  -.26
1908  -.27
1909  -.28
1910  -.25
1911  -.23
1912  -.17
1913  -.13
1914  -.12
1915  -.14
1916  -.16
1917  -.2
1918  -.21
1919  -.18
1920  -.14
1921  -.09
1922  -.09
1923  -.09
1924  -.05
1925  -.03
1926  .0
1927  -.0
1928  .01
1929  .0
1930  .01
1931  -.03
1932  .01
1933  .02
1934  .03
1935  .06
1936  .1
1937  .08
1938  .12
1939  .13
1940  .12
1941  .1
1942  .12
1943  .09
1944  .05
1945  .06
1946  .06
1947  .05
1948  .04
1949  .04
1950  .03
1951  .03
1952  .02
1953  .03
1954  -.0
1955  .01
1956  .01
1957  .02
1958  .04
1959  .08
1960  .07
1961  .05
1962  .01
1963  -.03
1964  -.09
1965  -.11
1966  -.13
1967  -.1
1968  -.05
1969  -.02
1970  -.01
1971  -.03
1972  .04
1973  .02
1974  -.0
1975  -.01
1976  .04
1977  .01
1978  .04
1979  *
1980  *