Select Criteria Based On Date - Cleaner Way To Write?

Code:

SELECT (JUL_CURR_CREDITS + JUL_CURR_DEBITS +
AUG_CURR_CREDITS + AUG_CURR_DEBITS +
SEP_CURR_CREDITS + SEP_CURR_DEBITS +
OCT_CURR_CREDITS + OCT_CURR_DEBITS +
NOV_CURR_CREDITS + NOV_CURR_DEBITS +
DEC_CURR_CREDITS + DEC_CURR_DEBITS +
JAN_CURR_CREDITS + JAN_CURR_DEBITS +
FEB_CURR_CREDITS + FEB_CURR_DEBITS +
MAR_CURR_CREDITS + MAR_CURR_DEBITS +
APR_CURR_CREDITS + APR_CURR_DEBITS +
MAY_CURR_CREDITS + MAY_CURR_DEBITS +
JUN_CURR_CREDITS + JUN_CURR_DEBITS) as CURR_AMT



I need to sum these amounts running from July to the month prior to whatever the current month is. So if it was August, it would only be

Code:

SELECT (JUL_CURR_CREDITS + JUL_CURR_DEBITS) as CURR_AMT



Is there a cleaner (shorter) way to iterate through the twelve months than either writing the query 12 times in an IF statement, or 12 CASE statements? This is only part of a query that joins several tables (not shown).

Any suggestions on the best way to write this would be valued.