Frequencies for first 10,000 rows of drug3cl2 variable in nhamcsed2002 dataset :

   drug3cl2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,676       96.76       96.76
       0120 |          7        0.07       96.83
       0502 |          5        0.05       96.88
       0506 |          2        0.02       96.90
       0507 |          5        0.05       96.95
       0512 |          7        0.07       97.02
       0513 |          4        0.04       97.06
       0874 |          1        0.01       97.07
       0875 |          3        0.03       97.10
       0877 |          2        0.02       97.12
       0913 |          1        0.01       97.13
       1040 |          1        0.01       97.14
       1200 |          1        0.01       97.15
       1265 |          3        0.03       97.18
       1275 |         16        0.16       97.34
       1373 |         17        0.17       97.51
       1480 |          1        0.01       97.52
       1567 |          2        0.02       97.54
       1569 |         11        0.11       97.65
       1671 |         52        0.52       98.17
       1721 |         11        0.11       98.28
       1722 |          1        0.01       98.29
       1724 |         32        0.32       98.61
       1727 |          6        0.06       98.67
       1728 |         86        0.86       99.53
       1943 |          3        0.03       99.56
       1944 |          6        0.06       99.62
       2095 |         38        0.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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