Table:
1980 to 2000
2000 to 2015
2000 to 2015 less 1980 to 2000

percent

industry

agriculture, forestry, fishing and hunting
2.7
2.5
-0.2

mining and oil and gas extraction
-0.3
-4.6
-4.3

utilities
0.3
-1.4
-1.7

construction
-0.3
-0.3
0.0

manufacturing
2.1
0.3
-1.8

wholesale trade
2.1
1.5
-0.6

retail trade
1.1
1.1
0.0

transportation and warehousing
1.2
-0.3
-1.5

information and cultural industries
0.4
0.7
0.3

finance, insurance, real estate and renting and leasing
-0.7
1.0
1.7

professional, scientific and technical services
-1.1
-0.3
0.8

administrative and support, waste management and remediation services
-1.5
-0.7
0.8

arts, entertainment and recreation
-3.2
-1.1
2.1

accommodation and food services
-1.3
0.1
1.4

other private services
-0.9
0.1
1.0

total business sector
0.4
-0.2
-0.6

A table may have multiple merged cells and we can represent a merged cell region by a JSON {'top-left':(A, B), 'bottom-right':(C, D)}. Here, '(A, B)' and '(C, D)' denote the coordinates (row_id, column_id) of the top-left and bottom-right cells of the merged regions, respectively. Now, based on the shown table image, please find all merged cells in this table and return their representations in the above format. Keep in mind that row and column IDs start from 1.

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