CREATE TABLE table_65886 ("Source" TEXT, "Chrome" TEXT, "Internet Explorer" TEXT, "Firefox" TEXT, "Safari" TEXT, "Opera" TEXT, "Other" TEXT)

What percentage of users were using Internet Explorer according to the source that reported 20.01% used Firefox?
SELECT "Internet Explorer" FROM table_65886 WHERE "Firefox" = '20.01%'
SELECT "Internet Explorer" FROM "table_65886" WHERE "Firefox" = '20.01%'