Frequencies for first 10,000 rows of pct012n149 variable in sf12010860us33 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,110       91.10       91.10
          1 |        588        5.88       96.98
          2 |        160        1.60       98.58
          3 |         44        0.44       99.02
          4 |         29        0.29       99.31
          5 |         14        0.14       99.45
          6 |         15        0.15       99.60
          7 |          6        0.06       99.66
          8 |          5        0.05       99.71
          9 |          8        0.08       99.79
         10 |          1        0.01       99.80
         11 |          3        0.03       99.83
         13 |          2        0.02       99.85
         14 |          1        0.01       99.86
         15 |          1        0.01       99.87
         17 |          1        0.01       99.88
         19 |          2        0.02       99.90
         20 |          2        0.02       99.92
         22 |          1        0.01       99.93
         25 |          1        0.01       99.94
         26 |          1        0.01       99.95
         31 |          1        0.01       99.96
         34 |          2        0.02       99.98
         40 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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