Frequencies for first 10,000 rows of pct012k133 variable in sf12010880us30 dataset :

   26 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,267       92.67       92.67
          1 |        528        5.28       97.95
          2 |        136        1.36       99.31
          3 |         45        0.45       99.76
          4 |         12        0.12       99.88
          5 |          5        0.05       99.93
          6 |          3        0.03       99.96
          7 |          1        0.01       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         17 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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