Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos1995 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,723       97.23       97.23
          0 |         16        0.16       97.39
          1 |        105        1.05       98.44
          2 |        155        1.55       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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