The United States is a bit more corrupt than tight-arsed northern European and richer Commonwealth nations, but isn't particularly corrupt all considered. Trump's slackin'! Movers and shakers: Britain itself cleaned up its act after years of politicans dipping into the public kitty, but Australia's slipping–reportedly a crisis of perception more than actual corruption, but alarming all the same.
Since 2012, several countries significantly improved their index score, including Côte d’Ivoire, Senegal and the United Kingdom, while several countries declined, including Syria, Yemen and Australia.
Here's the least corrupt/
1. New Zealand
2. Denmark
3. Finland, Norway, Switzerland
6. Singapore, Sweden
8. Canada, Luxembourg, Netherlands, United Kingdom16. United States
And the most corrupt.
180. Somalia
179. South Sudan
178. Syria
177. Afghanistan
175. Yemen, Sudan
171. Lybia, North Korea, Guinea-Bissau, Equatorial Guinea
Here's an embed that may or may not work: