Frequencies for first 10,000 rows of pct012n145 variable in sf12010880us33 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,185       91.85       91.85
          1 |        531        5.31       97.16
          2 |        130        1.30       98.46
          3 |         64        0.64       99.10
          4 |         21        0.21       99.31
          5 |          9        0.09       99.40
          6 |         14        0.14       99.54
          7 |         11        0.11       99.65
          8 |          3        0.03       99.68
          9 |          6        0.06       99.74
         10 |          1        0.01       99.75
         11 |          2        0.02       99.77
         12 |          3        0.03       99.80
         13 |          3        0.03       99.83
         14 |          4        0.04       99.87
         15 |          1        0.01       99.88
         16 |          2        0.02       99.90
         17 |          1        0.01       99.91
         18 |          1        0.01       99.92
         20 |          1        0.01       99.93
         21 |          3        0.03       99.96
         29 |          1        0.01       99.97
         31 |          1        0.01       99.98
         42 |          1        0.01       99.99
         45 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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