CREATE TABLE table_60816 ("Year" FLOAT, "Grand Slam" TEXT, "Round" TEXT, "Winner" TEXT, "Loser" TEXT)

In which year is Nerida Gregory listed as the loser?
SELECT AVG("Year") FROM table_60816 WHERE "Loser" = 'nerida gregory'
SELECT AVG("Year") FROM "table_60816" WHERE "Loser" = 'nerida gregory'