Frequencies for first 10,000 rows of prov2325 variable in pos1991 dataset :

       srv: |
orthotic/pr |
   osthetic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,965       99.65       99.65
          0 |         20        0.20       99.85
          1 |          3        0.03       99.88
          2 |          8        0.08       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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