CREATE TABLE table_26683 ("Region/Country" TEXT, "Local name" TEXT, "Main presenter" TEXT, "Network" TEXT, "Year premiered" FLOAT)

What is the highest year premiered when Benjamin Castaldi is main presenter?
SELECT MAX("Year premiered") FROM table_26683 WHERE "Main presenter" = 'Benjamin Castaldi'
SELECT MAX("Year premiered") FROM "table_26683" WHERE "Main presenter" = 'Benjamin Castaldi'