Frequencies for first 10,000 rows of pct012e129 variable in sf12000860us20 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,672       96.72       96.72
          1 |        279        2.79       99.51
          2 |         34        0.34       99.85
          3 |         11        0.11       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