Frequencies for first 10,000 rows of pct012c176 variable in sf12010860us22 dataset :

   69 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,228       92.28       92.28
          1 |        605        6.05       98.33
          2 |        107        1.07       99.40
          3 |         25        0.25       99.65
          4 |         11        0.11       99.76
          5 |          5        0.05       99.81
          6 |          4        0.04       99.85
          7 |          3        0.03       99.88
          8 |          2        0.02       99.90
          9 |          1        0.01       99.91
         10 |          1        0.01       99.92
         11 |          1        0.01       99.93
         12 |          1        0.01       99.94
         16 |          1        0.01       99.95
         20 |          1        0.01       99.96
         22 |          2        0.02       99.98
         27 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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