Frequencies for first 10,000 rows of pct012e140 variable in sf12000860us20 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,729       97.29       97.29
          1 |        233        2.33       99.62
          2 |         30        0.30       99.92
          3 |          4        0.04       99.96
          4 |          3        0.03       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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