Frequencies for first 10,000 rows of pct012e137 variable in sf12000860us20 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,670       96.70       96.70
          1 |        284        2.84       99.54
          2 |         37        0.37       99.91
          3 |          6        0.06       99.97
          4 |          2        0.02       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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