2021 Corruption Perceptions Index (CPI) released by Transparency International

It shows that corruption levels remain at a standstill worldwide, with 86 per cent of countries making little to no progress in the last 10 years.

The CPI ranks 180 countries and territories by their perceived levels of public sector corruption on a scale of zero (highly corrupt) to 100 (very clean).

The CPI global average remains unchanged at 43 for the tenth year in a row, and two-thirds of countries score below 50.

For each country’s individual score and changes over time, as well as analysis for each region.

Since its inception in 1995, the Corruption Perceptions Index has become the leading global indicator of public sector corruption. The Index scores 180 countries and territories around the world based on perceptions of public sector corruption, using data from 13 external sources, including the World Bank, World Economic Forum, private risk, and consulting companies, think tanks and others. The scores reflect the views of experts and businesspeople.

The process for calculating the CPI is regularly reviewed to make sure it is as robust and coherent as possible, most recently by the European Commission’s Joint Research Centre in 2017. All the CPI scores since 2012 are comparable from one year to the next.

Among the countries which significantly improved in the last 10 years, the United Republic of Tanzania can be found (ranked 87) on 180 countries.