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

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'