Frequencies for first 10,000 rows of pct012k134 variable in sf12000860us26 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,969       89.69       89.69
          1 |        759        7.59       97.28
          2 |        166        1.66       98.94
          3 |         56        0.56       99.50
          4 |         14        0.14       99.64
          5 |         11        0.11       99.75
          6 |          6        0.06       99.81
          7 |          3        0.03       99.84
          8 |          2        0.02       99.86
         10 |          3        0.03       99.89
         13 |          1        0.01       99.90
         16 |          1        0.01       99.91
         21 |          1        0.01       99.92
         30 |          1        0.01       99.93
         32 |          1        0.01       99.94
         34 |          1        0.01       99.95
         45 |          1        0.01       99.96
         55 |          1        0.01       99.97
         71 |          2        0.02       99.99
         87 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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