Frequencies for first 10,000 rows of pct012m038 variable in sf12010860us32 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,772       97.72       97.72
          1 |        199        1.99       99.71
          2 |         19        0.19       99.90
          3 |          7        0.07       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017