CREATE TABLE table_43595 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Attendance" FLOAT)

How many in total were in attendance at games where Chelsea was the away team?
SELECT SUM("Attendance") FROM table_43595 WHERE "Away team" = 'chelsea'
SELECT SUM("Attendance") FROM "table_43595" WHERE "Away team" = 'chelsea'