Frequencies for first 10,000 rows of pct012c181 variable in sf12000860us18 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,576       95.76       95.76
          1 |        345        3.45       99.21
          2 |         48        0.48       99.69
          3 |         17        0.17       99.86
          4 |          5        0.05       99.91
          7 |          2        0.02       99.93
          9 |          2        0.02       99.95
         10 |          2        0.02       99.97
         11 |          1        0.01       99.98
         12 |          1        0.01       99.99
         32 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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