Frequencies for first 10,000 rows of pct012k168 variable in sf12000860us26 dataset :

   61 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,404       94.04       94.04
          1 |        484        4.84       98.88
          2 |         71        0.71       99.59
          3 |         23        0.23       99.82
          4 |          2        0.02       99.84
          5 |          5        0.05       99.89
          6 |          3        0.03       99.92
          7 |          1        0.01       99.93
         12 |          1        0.01       99.94
         13 |          1        0.01       99.95
         20 |          1        0.01       99.96
         22 |          1        0.01       99.97
         25 |          1        0.01       99.98
         41 |          1        0.01       99.99
         47 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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