Frequencies for first 10,000 rows of pct012e030 variable in sf12000860us20 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,662       96.62       96.62
          1 |        285        2.85       99.47
          2 |         38        0.38       99.85
          3 |          9        0.09       99.94
          4 |          4        0.04       99.98
          5 |          1        0.01       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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