Frequencies for first 10,000 rows of pct012n160 variable in sf12000860us29 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,512       95.12       95.12
          1 |        351        3.51       98.63
          2 |         74        0.74       99.37
          3 |         25        0.25       99.62
          4 |         13        0.13       99.75
          5 |          8        0.08       99.83
          6 |          4        0.04       99.87
          7 |          4        0.04       99.91
          8 |          2        0.02       99.93
          9 |          2        0.02       99.95
         12 |          1        0.01       99.96
         15 |          1        0.01       99.97
         17 |          1        0.01       99.98
         18 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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