Frequencies for first 10,000 rows of pct012c022 variable in sf12000860us18 dataset :

   19 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,487       84.87       84.87
          1 |        962        9.62       94.49
          2 |        272        2.72       97.21
          3 |        104        1.04       98.25
          4 |         62        0.62       98.87
          5 |         46        0.46       99.33
          6 |         15        0.15       99.48
          7 |         10        0.10       99.58
          8 |          8        0.08       99.66
          9 |          7        0.07       99.73
         10 |          2        0.02       99.75
         11 |          3        0.03       99.78
         12 |          3        0.03       99.81
         13 |          2        0.02       99.83
         14 |          1        0.01       99.84
         15 |          1        0.01       99.85
         17 |          1        0.01       99.86
         18 |          3        0.03       99.89
         19 |          1        0.01       99.90
         23 |          1        0.01       99.91
         25 |          1        0.01       99.92
         27 |          1        0.01       99.93
         32 |          1        0.01       99.94
         33 |          1        0.01       99.95
         44 |          1        0.01       99.96
         45 |          1        0.01       99.97
         49 |          1        0.01       99.98
         69 |          1        0.01       99.99
         92 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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