Frequencies for first 10,000 rows of prov1890 variable in pos1995 dataset :

       110c |
mycobacteri |
      ology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,884       88.84       88.84
          N |      1,086       10.86       99.70
          Y |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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