Frequencies for first 10,000 rows of pct012n066 variable in sf12010880us33 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,620       96.20       96.20
          1 |        297        2.97       99.17
          2 |         47        0.47       99.64
          3 |         14        0.14       99.78
          4 |          7        0.07       99.85
          5 |          5        0.05       99.90
          6 |          1        0.01       99.91
          7 |          4        0.04       99.95
         10 |          1        0.01       99.96
         13 |          3        0.03       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017