Frequencies for first 10,000 rows of pct012k154 variable in sf12010860us30 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,645       86.45       86.45
          1 |        959        9.59       96.04
          2 |        250        2.50       98.54
          3 |         77        0.77       99.31
          4 |         36        0.36       99.67
          5 |          8        0.08       99.75
          6 |          3        0.03       99.78
          7 |          2        0.02       99.80
          8 |          1        0.01       99.81
          9 |          2        0.02       99.83
         10 |          3        0.03       99.86
         12 |          1        0.01       99.87
         13 |          1        0.01       99.88
         15 |          1        0.01       99.89
         17 |          1        0.01       99.90
         19 |          1        0.01       99.91
         21 |          1        0.01       99.92
         22 |          1        0.01       99.93
         34 |          1        0.01       99.94
         38 |          1        0.01       99.95
         42 |          1        0.01       99.96
         54 |          1        0.01       99.97
         58 |          1        0.01       99.98
         64 |          1        0.01       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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