Year        mean X-pole   mean Y-pole
                    (")            (")
    ==================================    

    1900.0         -.142         -.036     
    1901.0         -.140         -.027     
    1902.0         -.137         -.019     
    1903.0         -.135         -.011     
    1904.0         -.132         -.004     
    1905.0         -.129          .002     
    1906.0         -.126          .008     
    1907.0         -.123          .013     
    1908.0         -.120          .018     
    1909.0         -.117          .023     
    1910.0         -.113          .027     
    1911.0         -.110          .030     
    1912.0         -.106          .034     
    1913.0         -.102          .037     
    1914.0         -.098          .040     
    1915.0         -.094          .042     
    1916.0         -.091          .045     
    1917.0         -.087          .047     
    1918.0         -.084          .050     
    1919.0         -.081          .052     
    1920.0         -.078          .055     
    1921.0         -.076          .058     
    1922.0         -.074          .060     
    1923.0         -.073          .063     
    1924.0         -.073          .066     
    1925.0         -.072          .069     
    1926.0         -.073          .071     
    1927.0         -.073          .074     
    1928.0         -.074          .077     
    1929.0         -.074          .080     
    1930.0         -.075          .082     
    1931.0         -.075          .084     
    1932.0         -.075          .086     
    1933.0         -.075          .088     
    1934.0         -.074          .089     
    1935.0         -.072          .090     
    1936.0         -.071          .091     
    1937.0         -.068          .091     
    1938.0         -.065          .091     
    1939.0         -.062          .091     
    1940.0         -.058          .090     
    1941.0         -.054          .089     
    1942.0         -.050          .088     
    1943.0         -.046          .087     
    1944.0         -.042          .086     
    1945.0         -.039          .085     
    1946.0         -.035          .085     
    1947.0         -.032          .086     
    1948.0         -.029          .087     
    1949.0         -.026          .088     
    1950.0         -.024          .091     
    1951.0         -.022          .094     
    1952.0         -.021          .098     
    1953.0         -.020          .102     
    1954.0         -.019          .108     
    1955.0         -.019          .114     
    1956.0         -.018          .120     
    1957.0         -.018          .127     
    1958.0         -.018          .134     
    1959.0         -.017          .142     
    1960.0         -.017          .149     
    1961.0         -.016          .157     
    1962.0         -.015          .165     
    1963.0         -.014          .172     
    1964.0         -.012          .180     
    1965.0         -.010          .187     
    1966.0         -.008          .194     
    1967.0         -.006          .201     
    1968.0         -.003          .207     
    1969.0          .000          .214     
    1970.0          .003          .220     
    1971.0          .006          .226     
    1972.0          .010          .232     
    1973.0          .013          .237     
    1974.0          .017          .243     
    1975.0          .020          .249     
    1976.0          .024          .254     
    1977.0          .027          .260     
    1978.0          .030          .265     
    1979.0          .033          .270     
    1980.0          .036          .275     
    1981.0          .038          .280     
    1982.0          .041          .285     
    1983.0          .043          .290     
    1984.0          .045          .294     
    1985.0          .046          .299     
    1986.0          .047          .303     
    1987.0          .048          .307     
    1988.0          .049          .312     
    1989.0          .050          .316     
    1990.0          .050          .319     
    1991.0          .051          .323     
    1992.0          .051          .327     
    1993.0          .052          .330     
    1994.0          .053          .333     
    1995.0          .054          .335     
    1996.0          .055          .338     
    1997.0          .056          .340     
    1998.0          .058          .342     
    1999.0          .060          .343     
    2000.0          .063          .344     
    2001.0          .066          .345     
    2002.0          .070          .345     
    2003.0          .074          .345     
    2004.0          .079          .345     
    2005.0          .084          .346