Frequencies for first 10,000 rows of pct012n026 variable in sf12000860us29 dataset :

   23 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,258       92.58       92.58
          1 |        435        4.35       96.93
          2 |        148        1.48       98.41
          3 |         60        0.60       99.01
          4 |         29        0.29       99.30
          5 |         16        0.16       99.46
          6 |         15        0.15       99.61
          7 |          6        0.06       99.67
          8 |          5        0.05       99.72
          9 |          4        0.04       99.76
         10 |          5        0.05       99.81
         11 |          2        0.02       99.83
         12 |          1        0.01       99.84
         14 |          1        0.01       99.85
         15 |          1        0.01       99.86
         16 |          1        0.01       99.87
         18 |          1        0.01       99.88
         19 |          1        0.01       99.89
         20 |          1        0.01       99.90
         22 |          1        0.01       99.91
         23 |          3        0.03       99.94
         25 |          1        0.01       99.95
         28 |          1        0.01       99.96
         29 |          1        0.01       99.97
         32 |          2        0.02       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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