Frequencies for first 10,000 rows of pct012e033 variable in sf12010880us24 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,705       97.05       97.05
          1 |        249        2.49       99.54
          2 |         31        0.31       99.85
          3 |         10        0.10       99.95
          4 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017