Frequencies for first 10,000 rows of prov1865 variable in pos1991 dataset :

        010 |
histocompat |
    ibility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,536       85.36       85.36
          N |      1,431       14.31       99.67
          Y |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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