Frequencies for first 10,000 rows of pct012c178 variable in sf12000860us18 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,554       95.54       95.54
          1 |        370        3.70       99.24
          2 |         42        0.42       99.66
          3 |         13        0.13       99.79
          4 |          5        0.05       99.84
          5 |          3        0.03       99.87
          6 |          3        0.03       99.90
          8 |          1        0.01       99.91
          9 |          1        0.01       99.92
         10 |          2        0.02       99.94
         11 |          1        0.01       99.95
         14 |          2        0.02       99.97
         18 |          1        0.01       99.98
         19 |          1        0.01       99.99
         28 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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