CREATE TABLE table_57304 ("city" TEXT, "position" FLOAT, "Event" TEXT, "year" FLOAT, "Score" TEXT)

How many years did he play in santiago de compostela?
SELECT SUM("year") FROM table_57304 WHERE "city" = 'santiago de compostela'
SELECT SUM("year") FROM "table_57304" WHERE "city" = 'santiago de compostela'