Frequencies for first 10,000 rows of orthtc_prsthtc_srvc_cd variable in pos1992 dataset :

       srv: |
orthotic/pr |
   osthetic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,961       99.61       99.61
          0 |         21        0.21       99.82
          1 |          3        0.03       99.85
          2 |          8        0.08       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017