Frequencies for first 10,000 rows of pct013e009 variable in sf12010880us35 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,743       97.43       97.43
          1 |        215        2.15       99.58
          2 |         33        0.33       99.91
          3 |          8        0.08       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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