Frequencies for first 10,000 rows of pct012n157 variable in sf12000860us29 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,422       94.22       94.22
          1 |        408        4.08       98.30
          2 |         90        0.90       99.20
          3 |         35        0.35       99.55
          4 |         13        0.13       99.68
          5 |          7        0.07       99.75
          6 |          5        0.05       99.80
          7 |          5        0.05       99.85
          8 |          4        0.04       99.89
         11 |          1        0.01       99.90
         12 |          1        0.01       99.91
         13 |          1        0.01       99.92
         15 |          1        0.01       99.93
         17 |          1        0.01       99.94
         20 |          1        0.01       99.95
         21 |          1        0.01       99.96
         25 |          1        0.01       99.97
         30 |          2        0.02       99.99
         31 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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