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

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,387       93.87       93.87
          0 |         29        0.29       94.16
          1 |        186        1.86       96.02
          2 |        392        3.92       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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