Frequencies for first 10,000 rows of prov0010 variable in pos1999 dataset :

accreditati |
         on |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,833       68.33       68.33
          0 |      2,261       22.61       90.94
          1 |        867        8.67       99.61
          2 |         38        0.38       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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