What percentage of users were using Opera during the period in which 63.67% were using Internet Explorer?
CREATE TABLE table_13306 (
    "Period" text,
    "Internet Explorer" text,
    "Firefox" text,
    "Safari" text,
    "Opera" text,
    "Netscape" text,
    "Other Mozilla" text
)
SELECT "Opera" FROM table_13306 WHERE "Internet Explorer" = '63.67%'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What percentage of users were using Opera during the period in which 63.67% were using Internet Explorer? ### Input: CREATE TABLE table_13306 (
    "Period" text,
    "Internet Explorer" text,
    "Firefox" text,
    "Safari" text,
    "Opera" text,
    "Netscape" text,
    "Other Mozilla" text
) ### Response: SELECT "Opera" FROM table_13306 WHERE "Internet Explorer" = '63.67%'