2004 Least developed countries 259.601901 2004 Low-middle income 26.309857 2004 Other low-income 18.687072 2004 Unallocated by income 85.180437 2004 Upper-middle income 19.933425 2005 Least developed countries 276.419119 2005 Low-middle income 43.078067 2005 Other low-income 31.576771 2005 Unallocated by income 110.360269 2005 Upper-middle income 21.239584 2006 Least developed countries 361.178178 2006 Low-middle income 41.105320 2006 Other low-income 45.611269 2006 Unallocated by income 158.580437 2006 Upper-middle income 26.131525 2007 Least developed countries 448.982056 2007 Low-middle income 55.111068 2007 Other low-income 63.618771 2007 Unallocated by income 233.389679 2007 Upper-middle income 25.295571 2008 Least developed countries 506.245906 2008 Low-middle income 50.075376 2008 Other low-income 73.498603 2008 Unallocated by income 266.928783 2008 Upper-middle income 33.852896 2009 Least developed countries 407.906222 2009 Low-middle income 35.011173 2009 Other low-income 48.855436 2009 Unallocated by income 187.296706 2009 Upper-middle income 17.999227