Frequencies for first 10,000 rows of prov1885 variable in pos1991 dataset :

        110 |
bacteriolog |
          y |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,536       85.36       85.36
          N |        728        7.28       92.64
          Y |        736        7.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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