Frequencies for first 10,000 rows of pct012n149 variable in sf12000860us29 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,304       93.04       93.04
          1 |        460        4.60       97.64
          2 |        124        1.24       98.88
          3 |         35        0.35       99.23
          4 |         23        0.23       99.46
          5 |         16        0.16       99.62
          6 |         10        0.10       99.72
          7 |          4        0.04       99.76
          8 |          2        0.02       99.78
          9 |          3        0.03       99.81
         10 |          2        0.02       99.83
         11 |          1        0.01       99.84
         12 |          5        0.05       99.89
         13 |          1        0.01       99.90
         14 |          2        0.02       99.92
         18 |          1        0.01       99.93
         20 |          1        0.01       99.94
         23 |          1        0.01       99.95
         24 |          1        0.01       99.96
         26 |          1        0.01       99.97
         30 |          1        0.01       99.98
         31 |          1        0.01       99.99
         32 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017