CREATE TABLE table_40891 ("Rank" CLOB, "Name" CLOB, "Height m / feet" CLOB, "Floors" FLOAT, "Year" FLOAT)

When was the average year that the number of floors was greater than 75?
SELECT AVG("Year") FROM table_40891 WHERE "Floors" > '75'
SELECT AVG("Year") FROM "table_40891" WHERE "Floors" > '75'