As others have suggested, the table needs to be broken up and normalized. In a salary application, I venture to state that about 70% to 80% of data is static month to month. Consequently your monthly replication of 27000 of rows (with 37 columns) is a not good design. You really need to take a close look at the design and discuss with application programmers and DBAs.
Sorry, I did not mean to Answer it Under “Wiki”!!!
i do not know why it came that way – I must have posted my comments using not proper procedure!!