this is the Economics Report in Special English.A group that brings attention to the issue of corruptionsays levels of bribery, abuse of powerand secret dealings are still "very high" in many countries.Transparency International this weekreleased its yearly Corruption Perceptions Index.The Berlin-based group rates 176 countriesand territories with a number from zero to 100.Bigger numbers are better.The index measures the perceived, or apparent,level of corruption in a country.The group uses information from a number of economic sources.They include the African Development Bank,the World Bank and the World Economic Forum.Corruption takes many forms.Transparency International calls it"the abuse of entrusted power for private gain."One common form of corruption is bribery:the use of money or gifts to persuade another personto do something wrong or illegal.Corruption is not easy to measure because it is secretive.But the World Bank estimates that about $1 trillion in bribesare paid every year worldwide.Stealing public money is another form of corruption.Huguette Labelle is chair of Transparency International.She says the problem of corruption affects millions of peopleand limits their ability to get necessary services."And in some countries it can be that 50 percent of the populationhad to pay a bribe to gain access to essential serviceslike water, education, health, licenses."A group of small, developed nations scored highest on the new list.Denmark, Finland and New Zealand received a rating of 90.Among large nations, the United States rated 73 while China rated 39.The countries with the greatest perceived level of corruptionon the list are Somalia, North Korea and Afghanistan with scores of 8.Robin Hodess directs research at Transparency International.She says the index can show people involved in policy decisionshow others see the issue of corruption in their countries."We need evidence about how corruption works.We need to know where to target the reforms neededto promote transparency, accountability and integrity."The index measures perceptions held by experts,businesses and organizations.And their opinions are important.The World Bank notes that countries showing improvementsin perception indexes had greater foreign investment and economic growth.However, foreign aid and international tradeis less likely for countries perceived as highly corrupt.