CREATE TABLE table_33719 ("Coach" CLOB, "Years" CLOB, "Record" CLOB, "Conference Record" CLOB, "Overall Win Percentage" CLOB)

In what years was the conference record 18-15?
SELECT "Years" FROM table_33719 WHERE "Conference Record" = '18-15'
SELECT "Years" FROM "table_33719" WHERE "Conference Record" = '18-15'