Frequencies for first 10,000 rows of rehab_unit_trmntn_cd variable in pos1992 dataset :

rehabilitat |
   ion unit |
   terminat |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,858       98.58       98.58
          0 |        126        1.26       99.84
          1 |          4        0.04       99.88
          4 |          1        0.01       99.89
          7 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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