Table:
income, education, employment characteristics
crude rate per 100,000
95% confidence interval
age-standardized rate per 100,000
95% confidence interval
age-standardized rate ratio
95% confidence interval

from
to
from
to
from
to

household income quintile

quintile 1
23.4
21.0
25.8
25.8
23.2
28.5
3.9
3.4
4.6

2
12.7
10.9
14.5
13.6
11.5
15.6
2.1
1.8
2.4

3
9.0
7.6
10.4
9.3
7.8
10.7
1.4
1.2
1.6

4
7.0
5.9
8.1
7.2
6.0
8.4
1.1
0.9
1.3

quintile 5
6.6
5.5
7.8
6.6
5.6
7.6
..
..

highest level of educational attainment

no certificate, diploma or degree
23.0
20.4
25.7
26.3
23.0
29.6
2.1
1.9
2.4

high school diploma (or equivalent) and/or trade certificate
14.3
12.8
15.8
14.6
13.0
16.1
1.2
1.0
1.3

college diploma or university below bachelor's level
12.7
11.1
14.4
12.4
10.7
14.1
..
..

university degree
5.5
4.3
6.7
5.8
4.4
7.2
0.5
0.4
0.5

labour force status

employed
6.5
5.8
7.2
6.6
5.9
7.4
..
..

unemployed
20.1
14.5
25.6
20.4
13.9
26.9
3.1
2.8
3.5

not in labour force
30.8
27.8
33.7
32.5
29.3
35.7
4.8
3.0
7.5

not in labour force
19.6
16.6
22.5
19.6
16.6
22.5
3.0
2.6
3.3

occupation

management
5.1
2.8
7.4
6.4
3.6
9.2
0.7
0.6
0.9

business, finance and administration
7.3
5.6
8.9
7.0
5.4
8.6
0.8
0.6
0.9

natural and applied sciences and related
3.0
1.9
4.0
2.8
1.6
4.0
0.3
0.2
0.4

health
9.2
5.7
12.8
8.3
5.1
11.4
0.9
0.7
1.1

education, law, social, community, and government services
6.8
5.0
8.6
6.6
4.9
8.3
0.7
0.6
0.9

art, culture, recreation, sport
6.1
3.6
8.6
7.0
3.5
10.5
0.8
0.6
0.9

sales and service
9.5
7.7
11.3
9.1
7.2
11.0
..
..

trades, transport, equipment operators, and related
9.7
7.9
11.5
9.5
7.7
11.3
1.0
0.9
1.3

natural resources, agriculture, and related production
6.7
3.8
9.7
6.6
3.5
9.6
0.7
0.6
0.9

manufacturing, and utilities
8.2
5.2
11.2
12.7
2.4
23.1
1.4
1.1
1.7

Statement: the crude rate of hops was inversely related to household income, with rates ranging from 23.4 per 100,000 among people in the lowest income quintile to 6.6 per 100,000 among those in the highest.
Question: what was the range of the crude rate of hops inversely related to household income?
Answer: [6.6, 23.4]