CREATE TABLE table_36890 ("Year" FLOAT, "Trim" TEXT, "Engine" TEXT, "Power" TEXT, "Torque" TEXT, "EPA  ( 2008 )  City" TEXT)

What's the Year average that's got Trim of LS/LT and Power of HP (KW)?
SELECT AVG("Year") FROM table_36890 WHERE "Trim" = 'ls/lt' AND "Power" = 'hp (kw)'
SELECT AVG("Year") FROM "table_36890" WHERE "Power" = 'hp (kw)' AND "Trim" = 'ls/lt'