Frequencies for first 10,000 rows of prov2880 variable in pos1991 dataset :

    type of |
     action |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          4        0.04        0.04
          1 |      2,177       21.77       21.81
          2 |      7,496       74.96       96.77
          3 |        198        1.98       98.75
          4 |         70        0.70       99.45
          5 |         47        0.47       99.92
          6 |          4        0.04       99.96
          7 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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