Frequencies for first 10,000 rows of pct012n135 variable in sf12000860us29 dataset :

   28 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,198       91.98       91.98
          1 |        522        5.22       97.20
          2 |        132        1.32       98.52
          3 |         49        0.49       99.01
          4 |         28        0.28       99.29
          5 |         12        0.12       99.41
          6 |         12        0.12       99.53
          7 |          9        0.09       99.62
          8 |          4        0.04       99.66
          9 |          5        0.05       99.71
         10 |          6        0.06       99.77
         11 |          6        0.06       99.83
         12 |          2        0.02       99.85
         13 |          2        0.02       99.87
         14 |          3        0.03       99.90
         15 |          2        0.02       99.92
         16 |          1        0.01       99.93
         18 |          1        0.01       99.94
         21 |          1        0.01       99.95
         24 |          1        0.01       99.96
         29 |          1        0.01       99.97
         32 |          1        0.01       99.98
         40 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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