Frequencies for first 10,000 rows of prov1575 variable in pos2001 dataset :

participati |
    ng code |
      (y,n) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,739       87.39       87.39
          N |         98        0.98       88.37
          Y |      1,163       11.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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