Getting a specific value from the table based on the names of rows and columns in the script

[su_pyae]

Hello everyone, 

I have a table similar to this one. 

	100%	90%	80%
Year 1	2%	5%	9%
Year 2	4%	14%	20%
Year 3	10%	22%	35%
Year 4	25%	30%	50%

I would like to get the corresponding percentage based on the headers of rows and columns. 

For example, if it is Year 1 and 90%, I should get 5%. 

Year 1	90%	5%
Year 4	100%	25%
Year 3	80%	35%

Thank you for your help in advance.