Frequencies for first 10,000 rows of prov1575 variable in pos1999 dataset :

participati |
    ng code |
      (y,n) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,783       87.83       87.83
          N |         96        0.96       88.79
          Y |      1,121       11.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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