CREATE TABLE table_73317 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

What was the surface for events held in 1983?
SELECT "Surface" FROM table_73317 WHERE "Year" = '1983'
SELECT "Surface" FROM "table_73317" WHERE "Year" = '1983'