CREATE TABLE table_9544 ("Player" TEXT, "Country" TEXT, "Year ( s )  won" TEXT, "Total" FLOAT, "To par" TEXT, "Finish" TEXT)

What was the average total for the player from the United States, who won in 1978?
SELECT AVG("Total") FROM table_9544 WHERE "Country" = 'united states' AND "Year(s) won" = '1978'
SELECT AVG("Total") FROM "table_9544" WHERE "Country" = 'united states' AND "Year(s) won" = '1978'