The data you requested are contained in these files:

    snod.1836.nc
    snod.1837.nc
    snod.1838.nc
    snod.1839.nc
    snod.1840.nc
    snod.1841.nc
    snod.1842.nc
    snod.1843.nc
    snod.1844.nc
    snod.1845.nc
    snod.1846.nc
    snod.1847.nc
    snod.1848.nc
    snod.1849.nc
    snod.1850.nc
    snod.1851.nc
    snod.1852.nc
    snod.1853.nc
    snod.1854.nc
    snod.1855.nc
    snod.1856.nc
    snod.1857.nc
    snod.1858.nc
    snod.1859.nc
    snod.1860.nc
    snod.1861.nc
    snod.1862.nc
    snod.1863.nc
    snod.1864.nc
    snod.1865.nc
    snod.1866.nc
    snod.1867.nc
    snod.1868.nc
    snod.1869.nc
    snod.1870.nc
    snod.1871.nc
    snod.1872.nc
    snod.1873.nc
    snod.1874.nc
    snod.1875.nc
    snod.1876.nc
    snod.1877.nc
    snod.1878.nc
    snod.1879.nc
    snod.1880.nc
    snod.1881.nc
    snod.1882.nc
    snod.1883.nc
    snod.1884.nc
    snod.1885.nc
    snod.1886.nc
    snod.1887.nc
    snod.1888.nc
    snod.1889.nc
    snod.1890.nc
    snod.1891.nc
    snod.1892.nc
    snod.1893.nc
    snod.1894.nc
    snod.1895.nc
    snod.1896.nc
    snod.1897.nc
    snod.1898.nc
    snod.1899.nc
    snod.1900.nc
    snod.1901.nc
    snod.1902.nc
    snod.1903.nc
    snod.1904.nc
    snod.1905.nc
    snod.1906.nc
    snod.1907.nc
    snod.1908.nc
    snod.1909.nc
    snod.1910.nc
    snod.1911.nc
    snod.1912.nc
    snod.1913.nc
    snod.1914.nc
    snod.1915.nc
    snod.1916.nc
    snod.1917.nc
    snod.1918.nc
    snod.1919.nc
    snod.1920.nc
    snod.1921.nc
    snod.1922.nc
    snod.1923.nc
    snod.1924.nc
    snod.1925.nc
    snod.1926.nc
    snod.1927.nc
    snod.1928.nc
    snod.1929.nc
    snod.1930.nc
    snod.1931.nc
    snod.1932.nc
    snod.1933.nc
    snod.1934.nc
    snod.1935.nc
    snod.1936.nc
    snod.1937.nc
    snod.1938.nc
    snod.1939.nc
    snod.1940.nc
    snod.1941.nc
    snod.1942.nc
    snod.1943.nc
    snod.1944.nc
    snod.1945.nc
    snod.1946.nc
    snod.1947.nc
    snod.1948.nc
    snod.1949.nc
    snod.1950.nc
    snod.1951.nc
    snod.1952.nc
    snod.1953.nc
    snod.1954.nc
    snod.1955.nc
    snod.1956.nc
    snod.1957.nc
    snod.1958.nc
    snod.1959.nc
    snod.1960.nc
    snod.1961.nc
    snod.1962.nc
    snod.1963.nc
    snod.1964.nc
    snod.1965.nc
    snod.1966.nc
    snod.1967.nc
    snod.1968.nc
    snod.1969.nc
    snod.1970.nc
    snod.1971.nc
    snod.1972.nc
    snod.1973.nc
    snod.1974.nc
    snod.1975.nc
    snod.1976.nc
    snod.1977.nc
    snod.1978.nc
    snod.1979.nc
    snod.1980.nc