CREATE TABLE table_204_983 (id DECIMAL, "year" DECIMAL, "1st venue" TEXT, "2nd venue" TEXT, "3rd venue" TEXT, "4th venue" TEXT, "5th venue" TEXT, "6th venue" TEXT)

how long , in years , has the this world series been occurring ?
SELECT MAX("year") - MIN("year") FROM table_204_983
SELECT MAX("year") - MIN("year") FROM "table_204_983"