Frequencies for first 10,000 rows of pct012c045 variable in sf12010860us22 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,385       83.85       83.85
          1 |      1,033       10.33       94.18
          2 |        309        3.09       97.27
          3 |        120        1.20       98.47
          4 |         65        0.65       99.12
          5 |         31        0.31       99.43
          6 |         18        0.18       99.61
          7 |          6        0.06       99.67
          8 |          6        0.06       99.73
          9 |          8        0.08       99.81
         10 |          3        0.03       99.84
         11 |          2        0.02       99.86
         12 |          2        0.02       99.88
         13 |          1        0.01       99.89
         14 |          1        0.01       99.90
         15 |          1        0.01       99.91
         17 |          1        0.01       99.92
         21 |          1        0.01       99.93
         22 |          1        0.01       99.94
         26 |          1        0.01       99.95
         32 |          1        0.01       99.96
         49 |          1        0.01       99.97
         56 |          1        0.01       99.98
         59 |          1        0.01       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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