CREATE TABLE table_30613 ("IME Exchange  ( Including spot ,  credit and forward transactions ) " TEXT, "2007/08" TEXT, "2008/09" TEXT, "2009/10" TEXT, "2010/11" TEXT)

What is the 2007/08number when the 2010/11 is 1,633.6?
SELECT "2007/08" FROM table_30613 WHERE "2010/11" = '1,633.6'
SELECT "2007/08" FROM "table_30613" WHERE "2010/11" = '1,633.6'