Table:
estrogen/progestin type
%
95% confidence interval

from
to

total
100.00
..
..

ethinylestradiol/levonorgestrel
28.5
22.7
35.2

ethinylestradiol/norgestimate
27.2
22.7
32.1

ethinylestradiol/desogestrel
17.3
12.1
24.1

ethinylestradiol/drospirenone
16.1
9.9
25.3

other
10.9
7.4
15.7

Statement: drospirenone-containing formulations were taken by 16% of oc users.
Question: what was the proportion of oc users that took drospirenone-containing formulations?
Answer: [16.1]