CREATE TABLE table_11557 ("Year" FLOAT, "Theme" TEXT, "Mintage" FLOAT, "Issue Price" TEXT, "Finish" TEXT)

What is the issue price of a voyageur before 2006?
SELECT "Issue Price" FROM table_11557 WHERE "Year" < '2006' AND "Theme" = 'voyageur'
SELECT "Issue Price" FROM "table_11557" WHERE "Theme" = 'voyageur' AND "Year" < '2006'