Frequencies for first 10,000 rows of pct012c070 variable in sf12010860us22 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,152       91.52       91.52
          1 |        667        6.67       98.19
          2 |        110        1.10       99.29
          3 |         40        0.40       99.69
          4 |          9        0.09       99.78
          5 |          5        0.05       99.83
          6 |          4        0.04       99.87
          7 |          2        0.02       99.89
          9 |          2        0.02       99.91
         11 |          1        0.01       99.92
         13 |          1        0.01       99.93
         17 |          1        0.01       99.94
         19 |          2        0.02       99.96
         23 |          1        0.01       99.97
         28 |          1        0.01       99.98
         38 |          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