Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos2002 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,536       95.36       95.36
          0 |         21        0.21       95.57
          1 |        158        1.58       97.15
          2 |        284        2.84       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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