Frequencies for first 10,000 rows of tc1s2_1 variable in h68f4 dataset :

     MULTUM |
  THERAPEUT |
SUB-SUB-CLA |
     SS FOR |
      TC1S2 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -1 |      9,940       99.40       99.40
        205 |         32        0.32       99.72
        209 |         10        0.10       99.82
        268 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018