Frequencies for first 10,000 rows of pct012n038 variable in sf12010860us33 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,101       91.01       91.01
          1 |        553        5.53       96.54
          2 |        176        1.76       98.30
          3 |         53        0.53       98.83
          4 |         26        0.26       99.09
          5 |         30        0.30       99.39
          6 |          9        0.09       99.48
          7 |          9        0.09       99.57
          8 |          9        0.09       99.66
          9 |          2        0.02       99.68
         10 |          4        0.04       99.72
         11 |          3        0.03       99.75
         12 |          3        0.03       99.78
         13 |          6        0.06       99.84
         14 |          3        0.03       99.87
         15 |          3        0.03       99.90
         16 |          1        0.01       99.91
         19 |          2        0.02       99.93
         21 |          1        0.01       99.94
         24 |          1        0.01       99.95
         35 |          1        0.01       99.96
         36 |          1        0.01       99.97
         39 |          1        0.01       99.98
         43 |          1        0.01       99.99
         60 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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