Frequencies for first 10,000 rows of mdcl_suply_srvc_cd variable in pos2000 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,566       95.66       95.66
          0 |         22        0.22       95.88
          1 |        156        1.56       97.44
          2 |        255        2.55       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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