Frequencies for first 10,000 rows of pct012k175 variable in sf12010880us30 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,553       95.53       95.53
          1 |        374        3.74       99.27
          2 |         53        0.53       99.80
          3 |         15        0.15       99.95
          4 |          2        0.02       99.97
          5 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017