Frequencies for first 10,000 rows of pct012n022 variable in sf12010880us33 dataset :

   19 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,027       90.27       90.27
          1 |        628        6.28       96.55
          2 |        150        1.50       98.05
          3 |         66        0.66       98.71
          4 |         35        0.35       99.06
          5 |         33        0.33       99.39
          6 |         11        0.11       99.50
          7 |         12        0.12       99.62
          8 |          4        0.04       99.66
          9 |          5        0.05       99.71
         10 |          3        0.03       99.74
         11 |          5        0.05       99.79
         12 |          3        0.03       99.82
         13 |          2        0.02       99.84
         14 |          1        0.01       99.85
         15 |          2        0.02       99.87
         17 |          1        0.01       99.88
         19 |          2        0.02       99.90
         20 |          1        0.01       99.91
         21 |          1        0.01       99.92
         22 |          3        0.03       99.95
         27 |          2        0.02       99.97
         38 |          1        0.01       99.98
         53 |          1        0.01       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017