Frequencies for first 10,000 rows of pct013e030 variable in sf12000860us31 dataset :

   15 to 17 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,369       93.69       93.69
          1 |        481        4.81       98.50
          2 |        111        1.11       99.61
          3 |         22        0.22       99.83
          4 |          6        0.06       99.89
          5 |          8        0.08       99.97
          6 |          2        0.02       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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