Frequencies for first 10,000 rows of pct012k179 variable in sf12000860us26 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,621       96.21       96.21
          1 |        315        3.15       99.36
          2 |         40        0.40       99.76
          3 |          7        0.07       99.83
          4 |          4        0.04       99.87
          5 |          3        0.03       99.90
          6 |          1        0.01       99.91
          7 |          1        0.01       99.92
          8 |          1        0.01       99.93
          9 |          1        0.01       99.94
         10 |          2        0.02       99.96
         11 |          1        0.01       99.97
         15 |          1        0.01       99.98
         16 |          1        0.01       99.99
         29 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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