Table:
self-reported mental health rating
total - 65 years and over
65 to 74 years
75 to 84 years
85 years and over

women
men
women
men
women
men
women
men

percentage

positive
94.3
94.3
95.1
94.7
93.1
94.5
93.9
90.0

excellent
32.7
34.4
35.6
37.2
29.7
30.4
24.4
24.8

very good
35.6
34.6
35.3
35.4
36.1
34.1
35.8
28.8

good
26.0
25.3
24.2
22.1
27.3
30.0
33.6
36.3

negative
5.7
5.7
4.9
5.3
6.9
5.5
6.1
10.0

fair
4.9
5.0
4.3
4.5
5.7
5.0
5.7
9.0

poor
0.8
0.7
0.6
0.7
1.2
0.5
f
f

total
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0

A merged cell in a table can be described using the JSON {'top-left':(x, y), 'bottom-right':(m, n)}. Here, '(x, y)' represents the top-left and '(m, n)' the bottom-right cells' (row_id, column_id) of the merged region. Using the displayed table image, identify all such merged cells in this table and report their locations in the given format. Note that the numbering of both row and column IDs 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':(1, 8), 'bottom-right':(1, 9)}
{'top-left':(3, 2), 'bottom-right':(3, 9)}.