Frequencies for first 10,000 rows of pct012e003 variable in sf12010880us24 dataset :

    Under 1 |
       year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,823       98.23       98.23
          1 |        160        1.60       99.83
          2 |         12        0.12       99.95
          3 |          2        0.02       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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