I'm adding '99 since that's the first year post-Jordan.
'99 - Duncan
'00 - Shaq
'01 - Kobe
'02 - Shaq
'03 - Kobe
'04 - Garnett
'05 - Duncan
'06 - Kobe
'07 - Kobe
'08 - Kobe
'09 - Kobe
'10 - Kobe
'11 - Dirk
'12 - LeBron
'99 - Duncan
'00 - Shaq
'01 - Kobe
'02 - Shaq
'03 - Kobe
'04 - Garnett
'05 - Duncan
'06 - Kobe
'07 - Kobe
'08 - Kobe
'09 - Kobe
'10 - Kobe
'11 - Dirk
'12 - LeBron