Year US Dollars, Sum Over Component Sub-periods 2003-01-01 1239500000 2004-01-01 1283800000 2005-01-01 1984400000 2006-01-01 2810000000 2007-01-01 4946600000 2008-01-01 4700900000 2009-01-01 4373000000 2010-01-01 5961500000 2011-01-01 6005700000 2012-01-01 6243200000 2013-01-01 6486500000