CREATE TABLE table_13303 ("Period" CLOB, "Internet Explorer" CLOB, "Firefox" CLOB, "Safari" CLOB, "Opera" CLOB, "Netscape" CLOB, "Other Mozilla" CLOB)

What percentage of users were using Netscape during the period in which 63.67% were using Internet Explorer?
SELECT "Netscape" FROM table_13303 WHERE "Internet Explorer" = '63.67%'
SELECT "Netscape" FROM "table_13303" WHERE "Internet Explorer" = '63.67%'