Frequencies for first 10,000 rows of pct012o051 variable in sf12000860us30 dataset :

   48 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,507       75.07       75.07
          1 |      1,310       13.10       88.17
          2 |        506        5.06       93.23
          3 |        242        2.42       95.65
          4 |        135        1.35       97.00
          5 |         83        0.83       97.83
          6 |         49        0.49       98.32
          7 |         37        0.37       98.69
          8 |         24        0.24       98.93
          9 |         21        0.21       99.14
         10 |         20        0.20       99.34
         11 |         14        0.14       99.48
         12 |          4        0.04       99.52
         13 |         16        0.16       99.68
         14 |          3        0.03       99.71
         15 |          2        0.02       99.73
         16 |          7        0.07       99.80
         17 |          1        0.01       99.81
         18 |          1        0.01       99.82
         19 |          1        0.01       99.83
         20 |          4        0.04       99.87
         21 |          3        0.03       99.90
         22 |          1        0.01       99.91
         23 |          1        0.01       99.92
         24 |          4        0.04       99.96
         26 |          1        0.01       99.97
         33 |          1        0.01       99.98
         38 |          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