Frequencies for first 10,000 rows of prov2880 variable in pos1996 dataset :

    type of |
     action |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          4        0.04        0.04
          1 |      2,632       26.32       26.36
          2 |      7,046       70.46       96.82
          3 |        178        1.78       98.60
          4 |         20        0.20       98.80
          5 |        118        1.18       99.98
          6 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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