Frequencies for first 10,000 rows of pct013e033 variable in sf12000860us31 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,734       97.34       97.34
          1 |        223        2.23       99.57
          2 |         34        0.34       99.91
          3 |          7        0.07       99.98
          5 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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