Over the past 13 years, the corruption perception index has worsened in most Western countries. This includes the USA, where the decline was more significant compared to other nations. Notable countries experiencing a deterioration in their corruption perception index are a large part of Europe, Australia, New Zealand, and Japan. Turkey and Hungary are notably highlighted as the primary global anti-leaders in this negative trend.

Conversely, improvements in combating corruption have been observed in various Asian countries, especially in Central Asia, as well as in Greece, Saudi Arabia, and multiple African nations. These positive changes reflect a shift towards increased transparency and anti-corruption efforts in these regions.