Frequencies for first 10,000 rows of pct012n047 variable in sf12000860us29 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,359       93.59       93.59
          1 |        447        4.47       98.06
          2 |        103        1.03       99.09
          3 |         31        0.31       99.40
          4 |         18        0.18       99.58
          5 |         14        0.14       99.72
          6 |          5        0.05       99.77
          7 |          4        0.04       99.81
          8 |          3        0.03       99.84
          9 |          1        0.01       99.85
         10 |          1        0.01       99.86
         11 |          2        0.02       99.88
         12 |          1        0.01       99.89
         14 |          4        0.04       99.93
         16 |          3        0.03       99.96
         19 |          1        0.01       99.97
         21 |          1        0.01       99.98
         25 |          1        0.01       99.99
         42 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017