Frequencies for first 10,000 rows of pct012n039 variable in sf12000860us29 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,232       92.32       92.32
          1 |        516        5.16       97.48
          2 |        115        1.15       98.63
          3 |         54        0.54       99.17
          4 |         24        0.24       99.41
          5 |         15        0.15       99.56
          6 |          7        0.07       99.63
          7 |          4        0.04       99.67
          8 |          5        0.05       99.72
          9 |          1        0.01       99.73
         10 |          5        0.05       99.78
         11 |          4        0.04       99.82
         12 |          3        0.03       99.85
         13 |          2        0.02       99.87
         14 |          3        0.03       99.90
         15 |          1        0.01       99.91
         17 |          1        0.01       99.92
         18 |          2        0.02       99.94
         19 |          2        0.02       99.96
         23 |          1        0.01       99.97
         30 |          1        0.01       99.98
         35 |          1        0.01       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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