Frequencies for first 10,000 rows of pct012m152 variable in sf12010880us32 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,800       98.00       98.00
          1 |        184        1.84       99.84
          2 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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