Frequencies for first 10,000 rows of pct012c170 variable in sf12010860us22 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,855       88.55       88.55
          1 |        855        8.55       97.10
          2 |        176        1.76       98.86
          3 |         50        0.50       99.36
          4 |         29        0.29       99.65
          5 |         10        0.10       99.75
          6 |          8        0.08       99.83
          7 |          4        0.04       99.87
          9 |          1        0.01       99.88
         11 |          1        0.01       99.89
         15 |          1        0.01       99.90
         16 |          1        0.01       99.91
         17 |          2        0.02       99.93
         18 |          1        0.01       99.94
         23 |          1        0.01       99.95
         30 |          1        0.01       99.96
         35 |          1        0.01       99.97
         41 |          1        0.01       99.98
         51 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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