Frequencies for first 10,000 rows of pct013e021 variable in sf12010860us35 dataset :

   67 to 69 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,795       97.95       97.95
          1 |        191        1.91       99.86
          2 |         13        0.13       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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