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

  RESTRAINT |
 SYSTEM USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,472       44.72       44.72
          1 |         71        0.71       45.43
          2 |        378        3.78       49.21
          3 |      3,738       37.38       86.59
          4 |        109        1.09       87.68
          5 |        138        1.38       89.06
          6 |          3        0.03       89.09
          8 |         39        0.39       89.48
         13 |         10        0.10       89.58
         14 |         10        0.10       89.68
         15 |          2        0.02       89.70
         99 |      1,030       10.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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