Frequencies for first 10,000 rows of pct012n057 variable in sf12000860us29 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,639       96.39       96.39
          1 |        274        2.74       99.13
          2 |         48        0.48       99.61
          3 |         12        0.12       99.73
          4 |          8        0.08       99.81
          5 |          3        0.03       99.84
          6 |          2        0.02       99.86
          7 |          4        0.04       99.90
          8 |          3        0.03       99.93
          9 |          1        0.01       99.94
         10 |          1        0.01       99.95
         11 |          1        0.01       99.96
         13 |          1        0.01       99.97
         15 |          1        0.01       99.98
         16 |          1        0.01       99.99
         17 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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