Table:
women
men

bottom 90%
next 5%
next 4%
top 1%
bottom 90%
next 5%
next 4%
top 1%

percent

distribution of hours worked

less than 20
18.9
8.1
8.8
10.1
11.7
4.9
5.2
5.4

from 20 to 39
40.5
27.8
22.0
15.9
23.2
17.0
13.1
10.5

from 40 to 49
34.7
48.5
46.4
40.2
50.8
54.6
50.8
42.5

50 and over
6.0
15.6
22.8
33.8
14.4
23.6
31.0
41.6

distribution of hours worked for core-aged workers

less than 20
14.1
6.8
7.5
7.6
6.9
3.6
3.6
3.1

from 20 to 39
40.2
25.8
19.9
14.0
21.1
15.0
10.5
6.8

from 40 to 49
39.0
51.1
48.9
42.7
56.2
56.6
52.7
43.8

50 and over
6.6
16.2
23.7
35.7
15.8
24.9
33.3
46.3

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

The merged cell regions are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 5)}
{'top-left':(1, 6), 'bottom-right':(1, 9)}
{'top-left':(3, 2), 'bottom-right':(3, 9)}
{'top-left':(4, 2), 'bottom-right':(4, 9)}
{'top-left':(9, 2), 'bottom-right':(9, 9)}.