Frequencies for first 10,000 rows of orthtc_prsthtc_srvc_cd variable in pos2007 dataset :

       srv: |
orthotic/pr |
   osthetic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,861       98.61       98.61
          0 |        112        1.12       99.73
          1 |         10        0.10       99.83
          2 |          7        0.07       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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