Frequencies for first 10,000 rows of pct012c044 variable in sf12010860us22 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,305       83.05       83.05
          1 |      1,079       10.79       93.84
          2 |        324        3.24       97.08
          3 |        140        1.40       98.48
          4 |         53        0.53       99.01
          5 |         31        0.31       99.32
          6 |         22        0.22       99.54
          7 |         13        0.13       99.67
          8 |         11        0.11       99.78
          9 |          7        0.07       99.85
         10 |          1        0.01       99.86
         11 |          1        0.01       99.87
         12 |          1        0.01       99.88
         17 |          1        0.01       99.89
         19 |          1        0.01       99.90
         20 |          1        0.01       99.91
         21 |          1        0.01       99.92
         22 |          1        0.01       99.93
         26 |          2        0.02       99.95
         27 |          1        0.01       99.96
         44 |          1        0.01       99.97
         46 |          1        0.01       99.98
         52 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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