Special Depreciation Key - 50% Bonus

Hi Gurus,

Here is our requirement reg - Special Depreciation Key - 50% Bonus. Life of asset is 5 yrs. First yr depn should be 50%. Next four yrs 12.5%. We have created a key. In asset explorer, it is showing 50% of depn amt in first yr. But how to create for subsequent yrs. Pl help. Thank you.

Regards,

Irene