Table:
Busiest Domestic Routes to and from Glasgow Airport (2012)[23]

Rank
Airport
Passengers handled
Change
2011/12

1
London Heathrow
828,531
0%

2
London Gatwick
607,417
7%

3
London Stansted
331,607
3%

4
London Luton
276,488
0%

5
Belfast International
266,987
8%

6
Bristol
239,666
8%

7
Birmingham
208,123
2%

8
Southampton
173,576
24%

9
London City
158,239
6%

10
Belfast City
100,003
4%

According to the shown table image, what is the value of the cell positioned in row 9 and column 4 of the table? Format the cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.

The target cell value in row 9 and column 4 is {"row_id":"9", "column_id":"4", "cell_value":"24%"}.