Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos2008 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,371       93.71       93.71
          0 |         31        0.31       94.02
          1 |        196        1.96       95.98
          2 |        396        3.96       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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