Frequencies for first 10,000 rows of pct012k063 variable in sf12010860us30 dataset :

   60 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,950       89.50       89.50
          1 |        812        8.12       97.62
          2 |        156        1.56       99.18
          3 |         38        0.38       99.56
          4 |         17        0.17       99.73
          5 |          8        0.08       99.81
          6 |          3        0.03       99.84
          7 |          3        0.03       99.87
          8 |          1        0.01       99.88
         10 |          2        0.02       99.90
         15 |          1        0.01       99.91
         18 |          1        0.01       99.92
         20 |          1        0.01       99.93
         23 |          1        0.01       99.94
         24 |          1        0.01       99.95
         27 |          1        0.01       99.96
         34 |          1        0.01       99.97
         45 |          1        0.01       99.98
         56 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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