CREATE TABLE table_75309 ("Season" TEXT, "Season Premiere" TEXT, "Season Finale" TEXT, "Winner" TEXT, "Runner-up" TEXT, "Number of Contestants" FLOAT, "Winner's Country" TEXT, "Runner Up's Country" TEXT)

How many contestants were there on March 1, 2009 during the season premiere?
SELECT SUM("Number of Contestants") FROM table_75309 WHERE "Season Premiere" = 'march 1, 2009'
SELECT SUM("Number of Contestants") FROM "table_75309" WHERE "Season Premiere" = 'march 1, 2009'