Frequencies for first 10,000 rows of pct012c026 variable in sf12000860us18 dataset :

   23 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,618       86.18       86.18
          1 |        903        9.03       95.21
          2 |        249        2.49       97.70
          3 |        104        1.04       98.74
          4 |         48        0.48       99.22
          5 |         22        0.22       99.44
          6 |         10        0.10       99.54
          7 |         15        0.15       99.69
          8 |          2        0.02       99.71
          9 |          2        0.02       99.73
         10 |          5        0.05       99.78
         11 |          5        0.05       99.83
         12 |          1        0.01       99.84
         15 |          2        0.02       99.86
         16 |          1        0.01       99.87
         17 |          2        0.02       99.89
         20 |          1        0.01       99.90
         21 |          2        0.02       99.92
         27 |          1        0.01       99.93
         28 |          1        0.01       99.94
         29 |          1        0.01       99.95
         36 |          1        0.01       99.96
         54 |          1        0.01       99.97
         55 |          1        0.01       99.98
         66 |          1        0.01       99.99
         84 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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