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

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(X, Y), 'bottom-right':(Z, W)}. In this JSON item, '(X, Y)' and '(Z, W)' are the (row_id, column_id) coordinates for the top-left and bottom-right cells in the merged region, respectively. Please examine the provided table image, identify all merged cells, and return their details using the above-mentioned format. Remember, the numbering for both rows and columns starts at 1.

The merged cell regions 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)}.