Frequencies for first 10,000 rows of prov1575 variable in pos1991 dataset :

participati |
    ng code |
      (y,n) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,656       86.56       86.56
          N |        107        1.07       87.63
          Y |      1,237       12.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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