Frequencies for first 10,000 rows of pct012c053 variable in sf12010860us22 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,279       82.79       82.79
          1 |      1,114       11.14       93.93
          2 |        344        3.44       97.37
          3 |        126        1.26       98.63
          4 |         64        0.64       99.27
          5 |         29        0.29       99.56
          6 |         11        0.11       99.67
          7 |         12        0.12       99.79
          8 |          3        0.03       99.82
          9 |          2        0.02       99.84
         10 |          3        0.03       99.87
         12 |          2        0.02       99.89
         14 |          1        0.01       99.90
         18 |          1        0.01       99.91
         21 |          1        0.01       99.92
         30 |          1        0.01       99.93
         32 |          1        0.01       99.94
         33 |          1        0.01       99.95
         35 |          1        0.01       99.96
         40 |          1        0.01       99.97
         64 |          1        0.01       99.98
         68 |          1        0.01       99.99
         74 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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