Frequencies for first 10,000 rows of pct012k178 variable in sf12000860us26 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,619       96.19       96.19
          1 |        325        3.25       99.44
          2 |         25        0.25       99.69
          3 |         14        0.14       99.83
          4 |          1        0.01       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