Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos2009 dataset :

       SRV: |
    MEDICAL |
   SUPPLIES |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,360       93.60       93.60
          0 |         31        0.31       93.91
          1 |        201        2.01       95.92
          2 |        402        4.02       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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