Frequencies for first 10,000 rows of pct012k178 variable in sf12010860us30 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,479       94.79       94.79
          1 |        426        4.26       99.05
          2 |         66        0.66       99.71
          3 |         10        0.10       99.81
          4 |          4        0.04       99.85
          5 |          2        0.02       99.87
          6 |          1        0.01       99.88
          7 |          2        0.02       99.90
          8 |          1        0.01       99.91
          9 |          1        0.01       99.92
         10 |          1        0.01       99.93
         11 |          1        0.01       99.94
         14 |          1        0.01       99.95
         15 |          1        0.01       99.96
         18 |          1        0.01       99.97
         25 |          1        0.01       99.98
         39 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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