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

       srv: |
    medical |
     social |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,041       80.41       80.41
          0 |        296        2.96       83.37
          1 |      1,131       11.31       94.68
          2 |        352        3.52       98.20
          3 |        180        1.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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