Frequencies for first 10,000 rows of pct012k158 variable in sf12000860us26 dataset :

   51 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,887       88.87       88.87
          1 |        848        8.48       97.35
          2 |        174        1.74       99.09
          3 |         40        0.40       99.49
          4 |         20        0.20       99.69
          5 |          8        0.08       99.77
          6 |          7        0.07       99.84
          7 |          2        0.02       99.86
          8 |          2        0.02       99.88
          9 |          1        0.01       99.89
         12 |          1        0.01       99.90
         15 |          1        0.01       99.91
         20 |          1        0.01       99.92
         22 |          1        0.01       99.93
         27 |          1        0.01       99.94
         33 |          1        0.01       99.95
         34 |          1        0.01       99.96
         37 |          1        0.01       99.97
         47 |          1        0.01       99.98
         48 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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