Frequencies for first 10,000 rows of prov1575 variable in pos1998 dataset :

participati |
    ng code |
      (y,n) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,692       86.92       86.92
          N |        107        1.07       87.99
          Y |      1,201       12.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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