Frequencies for first 10,000 rows of pct012c162 variable in sf12010860us22 dataset :

   55 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,404       84.04       84.04
          1 |      1,101       11.01       95.05
          2 |        282        2.82       97.87
          3 |        110        1.10       98.97
          4 |         38        0.38       99.35
          5 |         26        0.26       99.61
          6 |          8        0.08       99.69
          7 |          7        0.07       99.76
          8 |          7        0.07       99.83
          9 |          1        0.01       99.84
         10 |          2        0.02       99.86
         11 |          1        0.01       99.87
         12 |          1        0.01       99.88
         13 |          1        0.01       99.89
         20 |          1        0.01       99.90
         21 |          1        0.01       99.91
         23 |          1        0.01       99.92
         26 |          2        0.02       99.94
         30 |          1        0.01       99.95
         38 |          1        0.01       99.96
         50 |          1        0.01       99.97
         68 |          1        0.01       99.98
         72 |          1        0.01       99.99
         78 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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