Frequencies for first 10,000 rows of pct012c160 variable in sf12000860us18 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,788       87.88       87.88
          1 |        882        8.82       96.70
          2 |        210        2.10       98.80
          3 |         59        0.59       99.39
          4 |         31        0.31       99.70
          5 |          6        0.06       99.76
          6 |          3        0.03       99.79
          7 |          3        0.03       99.82
          8 |          3        0.03       99.85
          9 |          2        0.02       99.87
         11 |          1        0.01       99.88
         13 |          2        0.02       99.90
         15 |          1        0.01       99.91
         16 |          1        0.01       99.92
         19 |          1        0.01       99.93
         24 |          1        0.01       99.94
         25 |          1        0.01       99.95
         26 |          1        0.01       99.96
         37 |          1        0.01       99.97
         41 |          1        0.01       99.98
         47 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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