Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos1998 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,558       95.58       95.58
          0 |         22        0.22       95.80
          1 |        145        1.45       97.25
          2 |        274        2.74       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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