Frequencies for first 10,000 rows of pct012m032 variable in sf12000860us28 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,791       97.91       97.91
          1 |        166        1.66       99.57
          2 |         38        0.38       99.95
          3 |          3        0.03       99.98
          4 |          1        0.01       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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