Frequencies for first 10,000 rows of pct012c122 variable in sf12000860us18 dataset :

   15 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,639       86.39       86.39
          1 |        928        9.28       95.67
          2 |        248        2.48       98.15
          3 |         85        0.85       99.00
          4 |         28        0.28       99.28
          5 |         20        0.20       99.48
          6 |         14        0.14       99.62
          7 |          7        0.07       99.69
          8 |          6        0.06       99.75
          9 |          6        0.06       99.81
         10 |          2        0.02       99.83
         11 |          4        0.04       99.87
         13 |          1        0.01       99.88
         15 |          1        0.01       99.89
         18 |          1        0.01       99.90
         20 |          1        0.01       99.91
         23 |          1        0.01       99.92
         26 |          1        0.01       99.93
         28 |          1        0.01       99.94
         35 |          1        0.01       99.95
         48 |          1        0.01       99.96
         54 |          1        0.01       99.97
         64 |          1        0.01       99.98
         84 |          1        0.01       99.99
         95 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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