Frequencies for first 10,000 rows of rest_use variable in person dataset :

  RESTRAINT |
 SYSTEM USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,604       46.04       46.04
          1 |         74        0.74       46.78
          2 |        600        6.00       52.78
          3 |      3,316       33.16       85.94
          4 |        115        1.15       87.09
          5 |        143        1.43       88.52
          6 |          2        0.02       88.54
          8 |         96        0.96       89.50
         13 |         17        0.17       89.67
         14 |          8        0.08       89.75
         15 |          6        0.06       89.81
         99 |      1,019       10.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016