Frequencies for first 10,000 rows of p028c016 variable in sf12000860us8 dataset :

Noninstitut |
  ionalized |
 population |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,777       97.77       97.77
          1 |        147        1.47       99.24
          2 |         40        0.40       99.64
          3 |         16        0.16       99.80
          4 |          7        0.07       99.87
          5 |          6        0.06       99.93
          6 |          3        0.03       99.96
          7 |          1        0.01       99.97
          8 |          1        0.01       99.98
         11 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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