Frequencies for first 10,000 rows of pct012d187 variable in sf12000860us19 dataset :

   80 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,996       89.96       89.96
          1 |        585        5.85       95.81
          2 |        172        1.72       97.53
          3 |         82        0.82       98.35
          4 |         51        0.51       98.86
          5 |         23        0.23       99.09
          6 |         19        0.19       99.28
          7 |         21        0.21       99.49
          8 |          9        0.09       99.58
          9 |         12        0.12       99.70
         10 |          5        0.05       99.75
         11 |          1        0.01       99.76
         12 |          5        0.05       99.81
         13 |          4        0.04       99.85
         14 |          1        0.01       99.86
         15 |          1        0.01       99.87
         16 |          3        0.03       99.90
         17 |          1        0.01       99.91
         19 |          1        0.01       99.92
         22 |          1        0.01       99.93
         28 |          2        0.02       99.95
         36 |          1        0.01       99.96
         42 |          2        0.02       99.98
         61 |          1        0.01       99.99
        122 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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