Frequencies for first 10,000 rows of p030c021 variable in sf12000860us9 dataset :

Noninstitut |
  ionalized |
 population |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,881       98.81       98.81
          1 |        102        1.02       99.83
          2 |         12        0.12       99.95
          3 |          2        0.02       99.97
          5 |          1        0.01       99.98
          9 |          1        0.01       99.99
         27 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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