Frequencies for first 10,000 rows of pct012e115 variable in sf12000860us20 dataset :

    8 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,748       97.48       97.48
          1 |        224        2.24       99.72
          2 |         24        0.24       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017