Frequencies for first 10,000 rows of pct012c043 variable in sf12000860us18 dataset :

   40 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,378       83.78       83.78
          1 |      1,089       10.89       94.67
          2 |        309        3.09       97.76
          3 |        104        1.04       98.80
          4 |         51        0.51       99.31
          5 |         25        0.25       99.56
          6 |         13        0.13       99.69
          7 |          6        0.06       99.75
          8 |          4        0.04       99.79
          9 |          4        0.04       99.83
         10 |          3        0.03       99.86
         11 |          3        0.03       99.89
         19 |          1        0.01       99.90
         21 |          1        0.01       99.91
         23 |          1        0.01       99.92
         25 |          1        0.01       99.93
         28 |          1        0.01       99.94
         29 |          1        0.01       99.95
         36 |          1        0.01       99.96
         42 |          1        0.01       99.97
         62 |          1        0.01       99.98
         65 |          1        0.01       99.99
         79 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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