Frequencies for first 10,000 rows of pct012e027 variable in sf12010880us24 dataset :

   24 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,696       96.96       96.96
          1 |        253        2.53       99.49
          2 |         39        0.39       99.88
          3 |          8        0.08       99.96
          4 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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