2004 Least developed countries 57.451075 2004 Low-middle income 170.746093 2004 Other low-income 45.349758 2004 Unallocated by income 53.992906 2004 Upper-middle income 55.029569 2005 Least developed countries 123.752026 2005 Low-middle income 966.069041 2005 Other low-income 22.561198 2005 Unallocated by income 62.323453 2005 Upper-middle income 68.176920 2006 Least developed countries 78.888427 2006 Low-middle income 802.980670 2006 Other low-income 13.942664 2006 Unallocated by income 114.383281 2006 Upper-middle income 92.827363 2007 Least developed countries 77.193106 2007 Low-middle income 707.349814 2007 Other low-income 342.175049 2007 Unallocated by income 146.999711 2007 Upper-middle income 78.474191 2008 Least developed countries 139.687580 2008 Low-middle income 850.506414 2008 Other low-income 41.944807 2008 Unallocated by income 167.566259 2008 Upper-middle income 83.737598 2009 Least developed countries 108.499753 2009 Low-middle income 153.446863 2009 Other low-income 34.237692 2009 Unallocated by income 168.463492 2009 Upper-middle income 55.594529