Frequencies for first 10,000 rows of pct012m003 variable in sf12010880us32 dataset :

    Under 1 |
       year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,887       98.87       98.87
          1 |        103        1.03       99.90
          2 |          8        0.08       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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