Frequencies for first 10,000 rows of pct012c155 variable in sf12000860us18 dataset :

   48 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,652       86.52       86.52
          1 |        929        9.29       95.81
          2 |        250        2.50       98.31
          3 |         94        0.94       99.25
          4 |         36        0.36       99.61
          5 |          6        0.06       99.67
          6 |          8        0.08       99.75
          7 |          6        0.06       99.81
          8 |          4        0.04       99.85
          9 |          1        0.01       99.86
         10 |          1        0.01       99.87
         12 |          2        0.02       99.89
         19 |          1        0.01       99.90
         20 |          1        0.01       99.91
         22 |          1        0.01       99.92
         24 |          1        0.01       99.93
         28 |          1        0.01       99.94
         33 |          1        0.01       99.95
         34 |          1        0.01       99.96
         46 |          1        0.01       99.97
         50 |          1        0.01       99.98
         53 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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