Frequencies for first 10,000 rows of pct012c181 variable in sf12010860us22 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,445       94.45       94.45
          1 |        441        4.41       98.86
          2 |         69        0.69       99.55
          3 |         19        0.19       99.74
          4 |          7        0.07       99.81
          5 |          5        0.05       99.86
          6 |          2        0.02       99.88
          7 |          1        0.01       99.89
          8 |          1        0.01       99.90
          9 |          1        0.01       99.91
         10 |          1        0.01       99.92
         12 |          1        0.01       99.93
         13 |          1        0.01       99.94
         16 |          3        0.03       99.97
         26 |          1        0.01       99.98
         28 |          1        0.01       99.99
         31 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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