CREATE TABLE table_17243 ("Date of Issue" TEXT, "Theme" TEXT, "Denomination" TEXT, "Design" TEXT, "Illustration" TEXT, "Printing Process" TEXT, "Paper Type" TEXT, "First Day Cover Cancellation" TEXT)

Who was responsible for the design of the Jasper National Park theme?
SELECT "Design" FROM table_17243 WHERE "Theme" = 'Jasper National Park'
SELECT "Design" FROM "table_17243" WHERE "Theme" = 'Jasper National Park'