Frequencies for first 10,000 rows of drug1cl2 variable in nhamcsed2002 dataset :

   drug1cl2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,700       87.00       87.00
       0120 |         17        0.17       87.17
       0502 |          3        0.03       87.20
       0507 |          2        0.02       87.22
       0510 |          1        0.01       87.23
       0512 |         10        0.10       87.33
       0513 |          4        0.04       87.37
       0875 |          5        0.05       87.42
       0877 |          1        0.01       87.43
       0878 |          4        0.04       87.47
       0913 |          4        0.04       87.51
       1036 |          1        0.01       87.52
       1265 |         30        0.30       87.82
       1268 |          4        0.04       87.86
       1274 |          1        0.01       87.87
       1275 |         50        0.50       88.37
       1373 |         23        0.23       88.60
       1480 |          1        0.01       88.61
       1567 |          3        0.03       88.64
       1568 |          7        0.07       88.71
       1569 |         40        0.40       89.11
       1671 |        107        1.07       90.18
       1721 |         24        0.24       90.42
       1722 |          4        0.04       90.46
       1723 |          4        0.04       90.50
       1724 |         97        0.97       91.47
       1727 |         17        0.17       91.64
       1728 |        678        6.78       98.42
       1863 |          1        0.01       98.43
       1940 |          1        0.01       98.44
       1941 |          1        0.01       98.45
       1943 |         15        0.15       98.60
       1944 |          8        0.08       98.68
       2095 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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