user: Question: What percentage of users were using Internet Explorer according to the source that reported 20.01% used Firefox?
Columns: ['Source', 'Chrome', 'Internet Explorer', 'Firefox', 'Safari', 'Opera', 'Other']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['StatCounter', '42.68%', '25.44%', '20.01%', '8.39%', '1.03%', '2.44%']
SQL:

assistant: SELECT "Internet Explorer" FROM "Table" WHERE "Firefox" = '20.01%';