Frequencies for first 10,000 rows of p012e021 variable in sf12010860us7 dataset :

   67 to 69 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,790       97.90       97.90
          1 |        196        1.96       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