Database: codebase_community
Question: What is the percentage difference of student badges given during 2010 and 2011?
SQL: SELECT CAST(SUM(IIF(STRFTIME('%Y', Date) = '2010', 1, 0)) AS REAL) * 100 / COUNT(Id) - CAST(SUM(IIF(STRFTIME('%Y', Date) = '2011', 1, 0)) AS REAL) * 100 / COUNT(Id) FROM badges WHERE Name = 'Student'