Frequencies for first 10,000 rows of pct012c190 variable in sf12010860us22 dataset :

   83 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,682       96.82       96.82
          1 |        270        2.70       99.52
          2 |         29        0.29       99.81
          3 |         10        0.10       99.91
          5 |          1        0.01       99.92
          6 |          1        0.01       99.93
          7 |          2        0.02       99.95
          9 |          1        0.01       99.96
         10 |          1        0.01       99.97
         11 |          1        0.01       99.98
         15 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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