CREATE TABLE table_204_756 (id DECIMAL, "year" DECIMAL, "team" TEXT, "games" DECIMAL, "combined tackles" DECIMAL, "tackles" DECIMAL, "assisted tackles" DECIMAL, "sacks" DECIMAL, "forced fumbles" DECIMAL, "fumble recoveries" DECIMAL, "fumble return yards" DECIMAL, "interceptions" DECIMAL, "interception return yards" DECIMAL, "yards per interception return" DECIMAL, "longest interception return" DECIMAL, "interceptions returned for touchdown" DECIMAL, "passes defended" DECIMAL)

how many consecutive years were there 20 or more assisted tackles ?
SELECT COUNT("year") FROM table_204_756 WHERE "assisted tackles" >= 20
SELECT COUNT("year") FROM "table_204_756" WHERE "assisted tackles" >= 20