Frequencies for first 10,000 rows of prov0010 variable in pos1997 dataset :

accreditati |
         on |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,331       73.31       73.31
          0 |      1,715       17.15       90.46
          1 |        942        9.42       99.88
          2 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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