Frequencies for first 10,000 rows of pct012o081 variable in sf12000860us30 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,197       91.97       91.97
          1 |        634        6.34       98.31
          2 |        118        1.18       99.49
          3 |         33        0.33       99.82
          4 |         10        0.10       99.92
          5 |          5        0.05       99.97
          7 |          1        0.01       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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