Frequencies for first 10,000 rows of pct012e120 variable in sf12000860us20 dataset :

   13 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,729       97.29       97.29
          1 |        237        2.37       99.66
          2 |         24        0.24       99.90
          3 |          6        0.06       99.96
          4 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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