Frequencies for first 10,000 rows of prov1575 variable in pos1993 dataset :

participati |
    ng code |
      (y,n) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,742       87.42       87.42
          N |        107        1.07       88.49
          Y |      1,151       11.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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