Frequencies for first 10,000 rows of orthtc_prsthtc_srvc_cd variable in pos2010 dataset :

       SRV: |
ORTHOTIC/PR |
   OSTHETIC |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,860       98.60       98.60
          0 |        115        1.15       99.75
          1 |         10        0.10       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