Frequencies for first 10,000 rows of pct012n018 variable in sf12010880us33 dataset :

   15 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,932       89.32       89.32
          1 |        694        6.94       96.26
          2 |        220        2.20       98.46
          3 |         63        0.63       99.09
          4 |         28        0.28       99.37
          5 |         19        0.19       99.56
          6 |          8        0.08       99.64
          7 |          4        0.04       99.68
          8 |          3        0.03       99.71
          9 |          5        0.05       99.76
         10 |          7        0.07       99.83
         11 |          1        0.01       99.84
         12 |          1        0.01       99.85
         13 |          1        0.01       99.86
         15 |          2        0.02       99.88
         16 |          2        0.02       99.90
         17 |          2        0.02       99.92
         23 |          3        0.03       99.95
         24 |          1        0.01       99.96
         31 |          1        0.01       99.97
         45 |          1        0.01       99.98
         47 |          1        0.01       99.99
         52 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017