CREATE TABLE table_76328 ("Episode" CLOB, "First broadcast" CLOB, "Graeme's guest" CLOB, "Jeremy's guest" CLOB, "Votes  ( % ) " CLOB)

What is Votes (%), when First Broadcast is '13 March 1998'?
SELECT "Votes (%)" FROM table_76328 WHERE "First broadcast" = '13 march 1998'
SELECT "Votes (%)" FROM "table_76328" WHERE "First broadcast" = '13 march 1998'