Frequencies for first 10,000 rows of pct012f090 variable in sf12010860us25 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,588       95.88       95.88
          1 |        267        2.67       98.55
          2 |         60        0.60       99.15
          3 |         37        0.37       99.52
          4 |         26        0.26       99.78
          5 |          8        0.08       99.86
          6 |          7        0.07       99.93
          7 |          2        0.02       99.95
          8 |          2        0.02       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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