Frequencies for first 10,000 rows of pct012d200 variable in sf12010880us23 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,691       96.91       96.91
          1 |        217        2.17       99.08
          2 |         50        0.50       99.58
          3 |         17        0.17       99.75
          4 |         11        0.11       99.86
          5 |          3        0.03       99.89
          6 |          3        0.03       99.92
          7 |          1        0.01       99.93
          8 |          1        0.01       99.94
          9 |          1        0.01       99.95
         10 |          1        0.01       99.96
         16 |          2        0.02       99.98
         17 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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