Frequencies for first 10,000 rows of mdcl_scl_srvc_cd variable in pos2010 dataset :

       SRV: |
    MEDICAL |
     SOCIAL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,671       76.71       76.71
          0 |        306        3.06       79.77
          1 |      1,373       13.73       93.50
          2 |        469        4.69       98.19
          3 |        181        1.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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