Frequencies for first 10,000 rows of pct012o159 variable in sf12000860us30 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,589       75.89       75.89
          1 |      1,311       13.11       89.00
          2 |        491        4.91       93.91
          3 |        208        2.08       95.99
          4 |        119        1.19       97.18
          5 |         79        0.79       97.97
          6 |         54        0.54       98.51
          7 |         38        0.38       98.89
          8 |         28        0.28       99.17
          9 |         14        0.14       99.31
         10 |         18        0.18       99.49
         11 |         12        0.12       99.61
         12 |          6        0.06       99.67
         13 |          7        0.07       99.74
         14 |          7        0.07       99.81
         15 |          3        0.03       99.84
         16 |          5        0.05       99.89
         17 |          1        0.01       99.90
         18 |          1        0.01       99.91
         20 |          1        0.01       99.92
         21 |          2        0.02       99.94
         25 |          1        0.01       99.95
         27 |          2        0.02       99.97
         33 |          1        0.01       99.98
         39 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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