Frequencies for first 10,000 rows of pct012n055 variable in sf12010880us33 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,380       93.80       93.80
          1 |        431        4.31       98.11
          2 |         94        0.94       99.05
          3 |         34        0.34       99.39
          4 |         18        0.18       99.57
          5 |          8        0.08       99.65
          6 |          9        0.09       99.74
          7 |          5        0.05       99.79
          8 |          2        0.02       99.81
          9 |          4        0.04       99.85
         10 |          3        0.03       99.88
         11 |          4        0.04       99.92
         12 |          1        0.01       99.93
         14 |          1        0.01       99.94
         17 |          2        0.02       99.96
         28 |          1        0.01       99.97
         30 |          2        0.02       99.99
         38 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017