Frequencies for first 10,000 rows of pct012n042 variable in sf12010860us33 dataset :

   39 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,141       91.41       91.41
          1 |        560        5.60       97.01
          2 |        152        1.52       98.53
          3 |         47        0.47       99.00
          4 |         33        0.33       99.33
          5 |         18        0.18       99.51
          6 |          9        0.09       99.60
          7 |          7        0.07       99.67
          8 |          5        0.05       99.72
          9 |          5        0.05       99.77
         10 |          5        0.05       99.82
         11 |          3        0.03       99.85
         12 |          1        0.01       99.86
         13 |          1        0.01       99.87
         14 |          3        0.03       99.90
         15 |          2        0.02       99.92
         16 |          1        0.01       99.93
         19 |          1        0.01       99.94
         20 |          1        0.01       99.95
         25 |          1        0.01       99.96
         30 |          1        0.01       99.97
         34 |          1        0.01       99.98
         36 |          1        0.01       99.99
         49 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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