Frequencies for first 10,000 rows of pct012n185 variable in sf12000860us29 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,828       98.28       98.28
          1 |        135        1.35       99.63
          2 |         30        0.30       99.93
          3 |          4        0.04       99.97
          6 |          1        0.01       99.98
          7 |          1        0.01       99.99
         22 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017