The data you requested are contained in these files:

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