Frequencies for first 10,000 rows of pct012e007 variable in sf12000860us20 dataset :

    4 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,736       97.36       97.36
          1 |        233        2.33       99.69
          2 |         24        0.24       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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