Table:
variables
hge
mge
lge
nf_nex
of_next
nf_ext
of_ext
full sample

averages

management practices and long-term strategies

management practices index
0.42
0.41
0.40
0.42
0.35
0.43
0.52
0.40

long-term strategic directions index
0.42
0.44
0.43
0.41
0.40
0.47
0.51
0.43

size of enterprise

number of employees
58.7
54.0
41.0
42.9
41.0
47.9
66.3
47.2

employment growth

annual growth based on 2009-2012 employment
35.6
11.2
-1.9
12.5
2.4
23.8
8.7
6.8

economic performance

sales per employee
210,231
303,046
242,791
275,331
231,402
207,793
330,219
256,959

net profit per employee
7,758
11,288
9,177
7,351
10,886
3,352
10,035
9,637

innovative enterprises, at least one type of innovation
68.1
78.0
58.9
66.2
56.5
79.5
85.6
65.8

number of innovative products and processes
1.7
8.2
1.2
0.4
1.0
2.3
12.3
3.4

other enterprise characteristics

performs r&d
21.0
39.2
38.6
24.6
33.6
23.5
57.1
36.6

physical and intangible assets per employee
110,512
87,650
136,575
46,134
120,094
147,442
151,897
118,478

share of profit centres
15.5
20.3
21.4
19.5
18.1
14.0
29.0
20.3

average age of enterprise
11.2
17.1
18.8
8.3
20.0
7.7
19.4
17.3

share of employees with a university degree
13.8
18.0
17.0
14.0
16.0
17.8
20.7
16.9

operations outside canada
12.8
26.4
20.3
0.1
16.3
23.7
43.1
21.2

share of competitors in the main market
4.6
4.9
4.9
5.0
4.8
5.1
5.0
4.9

share of enterprises in the manufacturing sector
12.0
19.8
19.0
7.8
18.9
11.4
26.4
18.4

share of enterprises in the service-producing sector
51.4
61.1
61.9
75.1
57.1
53.7
61.5
60.3

share of enterprises in the rest of the economy
36.6
19.1
19.1
17.1
24.0
34.9
12.1
21.3

number of enterprises

non-weighted total
313
919
1,719
270
1,639
164
878
2,951

Given a table image, please tell me which table cells are merged cells. Return the merged cell regions in the JSON format of {'top-left':(x, y), 'bottom-right':(z, w)}, where (x, y) and (z, w) represent the (row_id, column_id) coordinates of top-left cell and bottom-right cell, respectively. The row_id and column_id are numberd from 1.

The merged cell regions are as follows:
{'top-left':(1, 1), 'bottom-right':(2, 1)}
{'top-left':(2, 2), 'bottom-right':(2, 9)}
{'top-left':(3, 2), 'bottom-right':(3, 9)}
{'top-left':(6, 2), 'bottom-right':(6, 9)}
{'top-left':(8, 2), 'bottom-right':(8, 9)}
{'top-left':(10, 2), 'bottom-right':(10, 9)}
{'top-left':(15, 2), 'bottom-right':(15, 9)}
{'top-left':(26, 2), 'bottom-right':(26, 9)}.