Frequencies for first 10,000 rows of pct012n132 variable in sf12000860us29 dataset :

   25 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,218       92.18       92.18
          1 |        485        4.85       97.03
          2 |        137        1.37       98.40
          3 |         62        0.62       99.02
          4 |         35        0.35       99.37
          5 |         16        0.16       99.53
          6 |          8        0.08       99.61
          7 |          4        0.04       99.65
          8 |          9        0.09       99.74
          9 |          5        0.05       99.79
         10 |          2        0.02       99.81
         11 |          6        0.06       99.87
         12 |          2        0.02       99.89
         13 |          1        0.01       99.90
         14 |          1        0.01       99.91
         15 |          1        0.01       99.92
         16 |          2        0.02       99.94
         17 |          1        0.01       99.95
         20 |          1        0.01       99.96
         23 |          1        0.01       99.97
         32 |          1        0.01       99.98
         36 |          1        0.01       99.99
         53 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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