Frequencies for first 10,000 rows of comstat6 variable in nhamcsed1999 dataset :

composition |
status code |
for drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        204        2.04        2.04
          2 |         36        0.36        2.40
          3 |         19        0.19        2.59
          . |      9,741       97.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016