Frequencies for first 10,000 rows of pct012c029 variable in sf12010860us22 dataset :

   26 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,390       83.90       83.90
          1 |        943        9.43       93.33
          2 |        331        3.31       96.64
          3 |        135        1.35       97.99
          4 |         63        0.63       98.62
          5 |         44        0.44       99.06
          6 |         24        0.24       99.30
          7 |         16        0.16       99.46
          8 |         12        0.12       99.58
          9 |          3        0.03       99.61
         10 |          9        0.09       99.70
         11 |          5        0.05       99.75
         12 |          7        0.07       99.82
         13 |          6        0.06       99.88
         16 |          1        0.01       99.89
         17 |          2        0.02       99.91
         18 |          1        0.01       99.92
         22 |          1        0.01       99.93
         25 |          1        0.01       99.94
         27 |          1        0.01       99.95
         30 |          1        0.01       99.96
         32 |          1        0.01       99.97
         39 |          1        0.01       99.98
         46 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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