Frequencies for first 10,000 rows of pct012n066 variable in sf12000860us29 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,732       97.32       97.32
          1 |        210        2.10       99.42
          2 |         30        0.30       99.72
          3 |         13        0.13       99.85
          4 |          4        0.04       99.89
          5 |          3        0.03       99.92
          6 |          1        0.01       99.93
          7 |          2        0.02       99.95
          8 |          2        0.02       99.97
         10 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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