Frequencies for first 10,000 rows of pct012k186 variable in sf12000860us26 dataset :

   79 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,726       97.26       97.26
          1 |        222        2.22       99.48
          2 |         33        0.33       99.81
          3 |          7        0.07       99.88
          4 |          2        0.02       99.90
          5 |          3        0.03       99.93
          7 |          3        0.03       99.96
          8 |          2        0.02       99.98
         11 |          1        0.01       99.99
         32 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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