Frequencies for first 10,000 rows of pct012n163 variable in sf12000860us29 dataset :

   56 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,613       96.13       96.13
          1 |        305        3.05       99.18
          2 |         48        0.48       99.66
          3 |         11        0.11       99.77
          4 |          7        0.07       99.84
          5 |          4        0.04       99.88
          6 |          1        0.01       99.89
          7 |          5        0.05       99.94
         10 |          2        0.02       99.96
         11 |          1        0.01       99.97
         13 |          1        0.01       99.98
         16 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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