Frequencies for first 10,000 rows of prov1865 variable in pos1993 dataset :

        010 |
histocompat |
    ibility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,797       87.97       87.97
          N |      1,168       11.68       99.65
          Y |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016