Frequencies for first 10,000 rows of comstat4 variable in nhamcsed1998 dataset :

composition |
status code |
for drug #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        661        6.61        6.61
          2 |         95        0.95        7.56
          3 |         24        0.24        7.80
          . |      9,220       92.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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