Frequencies for first 10,000 rows of pct012o158 variable in sf12000860us30 dataset :

   51 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,620       76.20       76.20
          1 |      1,286       12.86       89.06
          2 |        491        4.91       93.97
          3 |        215        2.15       96.12
          4 |        111        1.11       97.23
          5 |         82        0.82       98.05
          6 |         46        0.46       98.51
          7 |         33        0.33       98.84
          8 |         25        0.25       99.09
          9 |         21        0.21       99.30
         10 |         15        0.15       99.45
         11 |         10        0.10       99.55
         12 |          9        0.09       99.64
         13 |          8        0.08       99.72
         14 |          7        0.07       99.79
         15 |          4        0.04       99.83
         16 |          3        0.03       99.86
         17 |          2        0.02       99.88
         18 |          3        0.03       99.91
         19 |          2        0.02       99.93
         20 |          1        0.01       99.94
         22 |          1        0.01       99.95
         23 |          1        0.01       99.96
         24 |          2        0.02       99.98
         28 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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