Frequencies for first 10,000 rows of pct012c044 variable in sf12000860us18 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,425       84.25       84.25
          1 |      1,099       10.99       95.24
          2 |        275        2.75       97.99
          3 |        100        1.00       98.99
          4 |         46        0.46       99.45
          5 |         20        0.20       99.65
          6 |         10        0.10       99.75
          7 |          7        0.07       99.82
          8 |          1        0.01       99.83
          9 |          1        0.01       99.84
         10 |          1        0.01       99.85
         11 |          2        0.02       99.87
         12 |          1        0.01       99.88
         13 |          1        0.01       99.89
         15 |          2        0.02       99.91
         18 |          1        0.01       99.92
         23 |          1        0.01       99.93
         27 |          1        0.01       99.94
         31 |          1        0.01       99.95
         33 |          1        0.01       99.96
         43 |          1        0.01       99.97
         53 |          2        0.02       99.99
         57 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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