Frequencies for first 10,000 rows of pct012m156 variable in sf12010860us32 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,781       97.81       97.81
          1 |        200        2.00       99.81
          2 |         17        0.17       99.98
          3 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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