Frequencies for first 10,000 rows of pct012e027 variable in sf12000860us20 dataset :

   24 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,651       96.51       96.51
          1 |        292        2.92       99.43
          2 |         40        0.40       99.83
          3 |         10        0.10       99.93
          4 |          5        0.05       99.98
          9 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017