Frequencies for first 10,000 rows of pct013e031 variable in sf12010860us35 dataset :

  18 and 19 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,533       95.33       95.33
          1 |        386        3.86       99.19
          2 |         59        0.59       99.78
          3 |         13        0.13       99.91
          4 |          7        0.07       99.98
          6 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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