Frequencies for first 10,000 rows of prov0890 variable in pos1991 dataset :

    general |
supervisor- |
    masters |
     degree |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,824       98.24       98.24
          1 |        113        1.13       99.37
          2 |         31        0.31       99.68
          3 |         23        0.23       99.91
          4 |          2        0.02       99.93
          5 |          3        0.03       99.96
          6 |          1        0.01       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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