Frequencies for first 10,000 rows of pct012c048 variable in sf12000860us18 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,507       85.07       85.07
          1 |      1,005       10.05       95.12
          2 |        300        3.00       98.12
          3 |        104        1.04       99.16
          4 |         33        0.33       99.49
          5 |         13        0.13       99.62
          6 |         11        0.11       99.73
          7 |          6        0.06       99.79
          8 |          5        0.05       99.84
          9 |          3        0.03       99.87
         12 |          2        0.02       99.89
         13 |          1        0.01       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         22 |          1        0.01       99.93
         24 |          1        0.01       99.94
         28 |          1        0.01       99.95
         32 |          2        0.02       99.97
         54 |          1        0.01       99.98
         64 |          1        0.01       99.99
         67 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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