Frequencies for first 10,000 rows of pct012k161 variable in sf12010860us30 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,658       86.58       86.58
          1 |        966        9.66       96.24
          2 |        242        2.42       98.66
          3 |         77        0.77       99.43
          4 |         20        0.20       99.63
          5 |         11        0.11       99.74
          6 |          4        0.04       99.78
          7 |          1        0.01       99.79
          8 |          4        0.04       99.83
          9 |          2        0.02       99.85
         10 |          2        0.02       99.87
         13 |          1        0.01       99.88
         14 |          1        0.01       99.89
         15 |          1        0.01       99.90
         23 |          1        0.01       99.91
         28 |          1        0.01       99.92
         29 |          1        0.01       99.93
         33 |          1        0.01       99.94
         39 |          1        0.01       99.95
         40 |          2        0.02       99.97
         68 |          1        0.01       99.98
         69 |          1        0.01       99.99
         80 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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