Frequencies for first 10,000 rows of prov1325 variable in pos1991 dataset :

     * tech |
    super - |
      histo |
  pathology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,970       99.70       99.70
          1 |         27        0.27       99.97
          2 |          2        0.02       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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