Table:
low income
total
canadian-born
immigrant

female
male
female
male
female
male

percentage

total age groups

visible minority
21.9
21.1
19.3
18.5
22.0
21.0

not a visible minority
14.3
12.2
14.2
12.2
14.3
12.3

under 15 years

visible minority
25.4
25.2
22.3
21.8
34.3
36.2

not a visible minority
15.2
15.2
14.9
14.9
26.1
25.7

15 to 24 years

visible minority
26.3
26.2
18.6
17.9
29.2
28.6

not a visible minority
15.8
13.7
15.4
13.3
20.8
18.7

25 to 54 years

visible minority
20.7
19.3
12.6
11.1
21.3
19.8

not a visible minority
12.7
11.2
12.5
10.9
14.3
13.7

55 to 64 years

visible minority
17.1
16.8
17.3
16.9
17.0
16.7

not a visible minority
14.4
13.2
14.5
13.2
13.4
13.1

65 years and over

visible minority
17.3
14.3
15.1
9.8
17.4
14.4

not a visible minority
16.2
9.5
17.1
10.0
12.9
7.4

Look at the table in the image and show any merged cells, specifying their locations with the JSON format of {'top-left':(R1, C1), 'bottom-right':(R2, C2)}, where R1, C1, R2 and C2 are indices (starting from 1) of the first row, the first column, the last row and the last column, respectively.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 3)}
{'top-left':(1, 4), 'bottom-right':(1, 5)}
{'top-left':(1, 6), 'bottom-right':(1, 7)}
{'top-left':(3, 2), 'bottom-right':(3, 7)}
{'top-left':(4, 2), 'bottom-right':(4, 7)}
{'top-left':(7, 2), 'bottom-right':(7, 7)}
{'top-left':(10, 2), 'bottom-right':(10, 7)}
{'top-left':(13, 2), 'bottom-right':(13, 7)}
{'top-left':(16, 2), 'bottom-right':(16, 7)}
{'top-left':(19, 2), 'bottom-right':(19, 7)}.