Frequencies for first 10,000 rows of pct012n054 variable in sf12010860us33 dataset :

   51 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,280       92.80       92.80
          1 |        487        4.87       97.67
          2 |        113        1.13       98.80
          3 |         52        0.52       99.32
          4 |         16        0.16       99.48
          5 |         14        0.14       99.62
          6 |         11        0.11       99.73
          7 |          4        0.04       99.77
          8 |          3        0.03       99.80
          9 |          1        0.01       99.81
         10 |          7        0.07       99.88
         11 |          1        0.01       99.89
         13 |          1        0.01       99.90
         14 |          2        0.02       99.92
         17 |          2        0.02       99.94
         18 |          1        0.01       99.95
         19 |          1        0.01       99.96
         20 |          1        0.01       99.97
         36 |          1        0.01       99.98
         42 |          1        0.01       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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