The data you requested are contained in these files:

    vgwd.1836.nc
    vgwd.1837.nc
    vgwd.1838.nc
    vgwd.1839.nc
    vgwd.1840.nc
    vgwd.1841.nc
    vgwd.1842.nc
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    vgwd.1851.nc
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    vgwd.1863.nc
    vgwd.1864.nc
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    vgwd.1866.nc
    vgwd.1867.nc
    vgwd.1868.nc
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    vgwd.1875.nc
    vgwd.1876.nc
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    vgwd.1879.nc
    vgwd.1880.nc
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    vgwd.1900.nc
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    vgwd.1903.nc
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    vgwd.1974.nc
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    vgwd.1976.nc
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    vgwd.1978.nc
    vgwd.1979.nc
    vgwd.1980.nc