Frequencies for first 10,000 rows of pct0030004 variable in sf12010860us15 dataset :

  (400-999) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,745       97.45       97.45
          1 |        175        1.75       99.20
          2 |         55        0.55       99.75
          3 |         11        0.11       99.86
          4 |         10        0.10       99.96
          5 |          3        0.03       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017