2004 Least developed countries 54.365646 2004 Low-middle income 40.043817 2004 Other low-income 15.263559 2004 Unallocated by income 30.041040 2004 Upper-middle income 10.050199 2005 Least developed countries 57.084741 2005 Low-middle income 68.832348 2005 Other low-income 17.596425 2005 Unallocated by income 60.299127 2005 Upper-middle income 13.395270 2006 Least developed countries 58.122359 2006 Low-middle income 44.768825 2006 Other low-income 19.872580 2006 Unallocated by income 57.030108 2006 Upper-middle income 17.005427 2007 Least developed countries 61.750221 2007 Low-middle income 64.495023 2007 Other low-income 22.212748 2007 Unallocated by income 75.518925 2007 Upper-middle income 13.527271 2008 Least developed countries 79.236335 2008 Low-middle income 66.538276 2008 Other low-income 29.138394 2008 Unallocated by income 85.412575 2008 Upper-middle income 11.539991 2009 Least developed countries 82.818692 2009 Low-middle income 38.083617 2009 Other low-income 22.491740 2009 Unallocated by income 70.977477 2009 Upper-middle income 9.962036