Frequencies for first 10,000 rows of prov0010 variable in pos1991 dataset :

accreditati |
         on |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,700       87.00       87.00
          0 |        310        3.10       90.10
          1 |        978        9.78       99.88
          2 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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