Frequencies for first 10,000 rows of pct012e136 variable in sf12000860us20 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,683       96.83       96.83
          1 |        278        2.78       99.61
          2 |         30        0.30       99.91
          3 |          7        0.07       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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