Frequencies for first 10,000 rows of rchdif13 variable in h84 dataset :

 DIFFICULTY |
   REACHING |
  OVER HEAD |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |          1        0.01        0.01
         -1 |      8,973       89.73       89.74
          1 |        460        4.60       94.34
          2 |        331        3.31       97.65
          3 |        139        1.39       99.04
          4 |         96        0.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018