Frequencies for first 10,000 rows of drug6cl2 variable in nhamcsed2002 dataset :

   drug6cl2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,947       99.47       99.47
       0120 |          3        0.03       99.50
       0507 |          2        0.02       99.52
       0513 |          4        0.04       99.56
       1265 |          4        0.04       99.60
       1274 |          1        0.01       99.61
       1275 |          2        0.02       99.63
       1373 |          1        0.01       99.64
       1569 |          3        0.03       99.67
       1671 |          4        0.04       99.71
       1721 |          2        0.02       99.73
       1722 |          3        0.03       99.76
       1724 |         13        0.13       99.89
       1728 |          6        0.06       99.95
       1943 |          1        0.01       99.96
       2095 |          3        0.03       99.99
       2100 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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