Frequencies for first 10,000 rows of mdcl_scl_srvc_cd variable in pos1992 dataset :

       srv: |
    medical |
     social |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,570       85.70       85.70
          0 |        387        3.87       89.57
          1 |        590        5.90       95.47
          2 |        393        3.93       99.40
          3 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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