Frequencies for first 10,000 rows of pct012n025 variable in sf12010880us33 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,058       90.58       90.58
          1 |        582        5.82       96.40
          2 |        168        1.68       98.08
          3 |         75        0.75       98.83
          4 |         38        0.38       99.21
          5 |         15        0.15       99.36
          6 |         14        0.14       99.50
          7 |          8        0.08       99.58
          8 |         12        0.12       99.70
          9 |          3        0.03       99.73
         10 |          5        0.05       99.78
         11 |          3        0.03       99.81
         12 |          1        0.01       99.82
         13 |          3        0.03       99.85
         14 |          1        0.01       99.86
         16 |          3        0.03       99.89
         17 |          1        0.01       99.90
         18 |          1        0.01       99.91
         20 |          1        0.01       99.92
         21 |          1        0.01       99.93
         22 |          1        0.01       99.94
         27 |          1        0.01       99.95
         30 |          1        0.01       99.96
         34 |          1        0.01       99.97
         42 |          1        0.01       99.98
         51 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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