Frequencies for first 10,000 rows of prov0055 variable in pos1996 dataset :

alcohol/dru |
     g unit |
termination |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,904       99.04       99.04
          1 |          3        0.03       99.07
          2 |          3        0.03       99.10
          4 |          1        0.01       99.11
          7 |         89        0.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017