Frequencies for first 10,000 rows of p030f021 variable in sf12000860us9 dataset :

Noninstitut |
  ionalized |
 population |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,752       97.52       97.52
          1 |        142        1.42       98.94
          2 |         43        0.43       99.37
          3 |         18        0.18       99.55
          4 |         11        0.11       99.66
          5 |          3        0.03       99.69
          6 |          8        0.08       99.77
          7 |          3        0.03       99.80
          8 |          5        0.05       99.85
          9 |          1        0.01       99.86
         10 |          2        0.02       99.88
         11 |          5        0.05       99.93
         14 |          1        0.01       99.94
         17 |          2        0.02       99.96
         18 |          1        0.01       99.97
         20 |          2        0.02       99.99
         33 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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