Frequencies for first 10,000 rows of pct012c131 variable in sf12000860us18 dataset :

   24 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,701       87.01       87.01
          1 |        852        8.52       95.53
          2 |        237        2.37       97.90
          3 |         99        0.99       98.89
          4 |         37        0.37       99.26
          5 |         29        0.29       99.55
          6 |         11        0.11       99.66
          7 |         10        0.10       99.76
          8 |          7        0.07       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 |          1        0.01       99.90
         16 |          1        0.01       99.91
         25 |          2        0.02       99.93
         33 |          1        0.01       99.94
         34 |          1        0.01       99.95
         35 |          1        0.01       99.96
         52 |          1        0.01       99.97
         61 |          1        0.01       99.98
         64 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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