Frequencies for first 10,000 rows of prov1895 variable in pos1991 dataset :

        120 |
   mycology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,536       85.36       85.36
          N |        891        8.91       94.27
          Y |        573        5.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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