HAMBURG | By Dr. Beate Reszat | The BIS Triennial Central Bank Survey of foreign exchange turnover makes a fascinating read. First of all, there is the rise in turnover volume: $5.3 trillion. Per day. By comparison: World exports in 2011 (the latest available number) were about $17.8 trillion. Per annum. Second, there is the number of currencies traded which, as the following list shows, has increased markedly. The Mexican peso and Chinese renminbi are even found among the top 10 most traded currencies now.