Frequencies for first 10,000 rows of pct012k014 variable in sf12010880us30 dataset :

   11 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,245       92.45       92.45
          1 |        594        5.94       98.39
          2 |         99        0.99       99.38
          3 |         32        0.32       99.70
          4 |         15        0.15       99.85
          5 |          5        0.05       99.90
          6 |          4        0.04       99.94
          7 |          2        0.02       99.96
         10 |          1        0.01       99.97
         12 |          1        0.01       99.98
         13 |          1        0.01       99.99
         30 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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