Table:
males
females

%
95% confidence interval
%
95% confidence interval

from
to
from
to

first nations people
53.2
50.7
55.8
65.9
63.7
68.1

metis
64.0
60.3
67.7
73.8
70.7
77.0

inuit
50.8
45.4
56.3
63.1
57.6
68.7

non-indigenous people
75.7
75.4
76.0
83.8
83.5
84.0

Statement: among the first nations household population, the probability of living to age 75 for females was 18 percentage points lower than that among the non-indigenous household population in 2011.
Question: how many percentage points was the probability of living to age 75 for females among the first nations household population lower than that among the non-indigenous household population in 2011?
Answer: [17.9]