Frequencies for first 10,000 rows of orthtc_prsthtc_srvc_cd variable in pos1994 dataset :

       srv: |
orthotic/pr |
   osthetic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,956       99.56       99.56
          0 |         25        0.25       99.81
          1 |          4        0.04       99.85
          2 |          7        0.07       99.92
          3 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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