In western Europe only Malta, San Marino, Switzerland and Sweden do not regulate party financing, the organization wrote in an article in the Dagens Nyheter daily on Tuesday.
Transparency International Sweden, part of the global network Transparency International (TI), works to monitor and combat corruption. Its annual Corruption Perception Index (CPI) ranks the degree of corruption in around 180 countries.
In 2008 Sweden was the country deemed to be the least corrupt, but in 2009 it fell two places. This year Sweden received the same number of points as last year, but fell further in the rankings.
“We remain among the top ranks however,” wrote TI Sweden regarding the CPI 2010 which is presented on Tuesday.
The survey was however completed before the massive corruption scandal in Gothenburg became known and TI Sweden argues that a slew of recent cases indicates that the incidence of corruption is on the rise in the country.
“As is clearly shown it is the municipal sector which is particularly exposed,” the organisation wrote in Dagens Nyheter.