Frequencies for first 10,000 rows of pct012n201 variable in sf12000860us29 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,977       99.77       99.77
          1 |         18        0.18       99.95
          2 |          2        0.02       99.97
          3 |          1        0.01       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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