Frequencies for first 10,000 rows of pct0030013 variable in sf12010860us15 dataset :

  (400-999) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,907       99.07       99.07
          1 |         76        0.76       99.83
          2 |          8        0.08       99.91
          3 |          3        0.03       99.94
          4 |          3        0.03       99.97
          5 |          2        0.02       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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