Maximum of a decode statement

Using a decode statement, how can I determine the maxium of the associated type of a code?

CODE TYPE RANK

K-LIFE   LE01 1
K-LIFE   LE02 2
K-LIFE   LE03 3

CODE TYPE RANK

L-LIFE   LS10   1
L-LIFE   LS25   2
L-LIFE   LS 30  3

Kevin Received on Tue Sep 01 1998 - 00:00:00 CDT