Frequencies for first 10,000 rows of pct012e031 variable in sf12000860us20 dataset :

   28 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,667       96.67       96.67
          1 |        283        2.83       99.50
          2 |         35        0.35       99.85
          3 |         10        0.10       99.95
          4 |          3        0.03       99.98
          5 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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