Frequencies for first 10,000 rows of pct012c055 variable in sf12000860us18 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,668       86.68       86.68
          1 |        985        9.85       96.53
          2 |        222        2.22       98.75
          3 |         63        0.63       99.38
          4 |         24        0.24       99.62
          5 |         13        0.13       99.75
          6 |          6        0.06       99.81
          7 |          4        0.04       99.85
          8 |          1        0.01       99.86
          9 |          1        0.01       99.87
         10 |          2        0.02       99.89
         12 |          1        0.01       99.90
         17 |          1        0.01       99.91
         19 |          1        0.01       99.92
         21 |          1        0.01       99.93
         23 |          1        0.01       99.94
         29 |          1        0.01       99.95
         30 |          1        0.01       99.96
         37 |          1        0.01       99.97
         41 |          1        0.01       99.98
         56 |          1        0.01       99.99
         57 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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