Frequencies for first 10,000 rows of pct012c029 variable in sf12000860us18 dataset :

   26 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,593       85.93       85.93
          1 |        926        9.26       95.19
          2 |        248        2.48       97.67
          3 |        115        1.15       98.82
          4 |         40        0.40       99.22
          5 |         27        0.27       99.49
          6 |         15        0.15       99.64
          7 |         10        0.10       99.74
          8 |          3        0.03       99.77
          9 |          4        0.04       99.81
         10 |          3        0.03       99.84
         11 |          1        0.01       99.85
         12 |          2        0.02       99.87
         14 |          2        0.02       99.89
         15 |          1        0.01       99.90
         17 |          1        0.01       99.91
         23 |          1        0.01       99.92
         26 |          1        0.01       99.93
         28 |          1        0.01       99.94
         29 |          1        0.01       99.95
         32 |          1        0.01       99.96
         41 |          1        0.01       99.97
         44 |          1        0.01       99.98
         68 |          1        0.01       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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