Frequencies for first 10,000 rows of pct012e134 variable in sf12000860us20 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,702       97.02       97.02
          1 |        251        2.51       99.53
          2 |         39        0.39       99.92
          3 |          7        0.07       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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