Go to the World Bank's website on global poverty: http://iresearch.worldbank.org/PovcalNet/povcalNet.html

Select "All" in the box for regions, select "national" in coverage, use the >> button to add all countries to the right panel, click the box "Aggregate over selected countries on a selected poverty line," and click "Continue." Enter 2005 for the reference year and $45 for the monthly poverty line and submit. Note the numbers for the poverty headcount and the poverty gap. Go back and select $60 for the monthly poverty line and submit. Note the numbers. On the basis of the information you have, how many people live on a monthly income between $45 and $60? Choose your own numbers using the PovcalNet website to get a better grasp of poverty. For example, compare the number of poor in the world living on a monthly income below $45 between 2005 and 2008.