Frequencies for first 10,000 rows of pct012c144 variable in sf12010860us22 dataset :

   37 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,459       84.59       84.59
          1 |        956        9.56       94.15
          2 |        308        3.08       97.23
          3 |        121        1.21       98.44
          4 |         58        0.58       99.02
          5 |         31        0.31       99.33
          6 |         28        0.28       99.61
          7 |          6        0.06       99.67
          8 |          8        0.08       99.75
          9 |          5        0.05       99.80
         10 |          6        0.06       99.86
         11 |          1        0.01       99.87
         13 |          2        0.02       99.89
         14 |          2        0.02       99.91
         21 |          1        0.01       99.92
         30 |          1        0.01       99.93
         31 |          1        0.01       99.94
         32 |          1        0.01       99.95
         35 |          1        0.01       99.96
         49 |          1        0.01       99.97
         62 |          1        0.01       99.98
         63 |          1        0.01       99.99
         98 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017