Frequencies for first 10,000 rows of pct012n028 variable in sf12000860us29 dataset :

   25 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,220       92.20       92.20
          1 |        490        4.90       97.10
          2 |        141        1.41       98.51
          3 |         47        0.47       98.98
          4 |         29        0.29       99.27
          5 |         18        0.18       99.45
          6 |         14        0.14       99.59
          7 |          4        0.04       99.63
          8 |          8        0.08       99.71
          9 |          5        0.05       99.76
         10 |          8        0.08       99.84
         11 |          4        0.04       99.88
         13 |          2        0.02       99.90
         14 |          1        0.01       99.91
         16 |          2        0.02       99.93
         17 |          1        0.01       99.94
         19 |          1        0.01       99.95
         25 |          1        0.01       99.96
         28 |          1        0.01       99.97
         29 |          1        0.01       99.98
         32 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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