Frequencies for first 10,000 rows of pct012n042 variable in sf12000860us29 dataset :

   39 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,245       92.45       92.45
          1 |        490        4.90       97.35
          2 |        128        1.28       98.63
          3 |         52        0.52       99.15
          4 |         26        0.26       99.41
          5 |         15        0.15       99.56
          6 |          8        0.08       99.64
          7 |          7        0.07       99.71
          8 |          4        0.04       99.75
          9 |          3        0.03       99.78
         10 |          2        0.02       99.80
         11 |          1        0.01       99.81
         12 |          4        0.04       99.85
         13 |          3        0.03       99.88
         14 |          2        0.02       99.90
         15 |          1        0.01       99.91
         17 |          1        0.01       99.92
         18 |          1        0.01       99.93
         20 |          3        0.03       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         31 |          1        0.01       99.99
         46 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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