In the 2020 corruption index released on Thursday, the country scored 25 out of 100 points — with zero signifying the worst performing countries and 100, the best-ranked.
It also dropped to 149 out of the 180 countries surveyed, making it the second most corrupt country in West Africa.
The 2020 corruption rating is one point below that of 2019 when the country scored 26 points, and two points below its ranking in 2018 and 2017 when it got 27 points.
It is also the worst ranking the country has got in five years. It scored 26 points in 2015 and 28 points in 2016.
On a sub-regional basis, Nigeria is among the worst-performing countries in West Africa, only second to Guinea-Bissau which was ranked 165 by .
The report pointed out that Sub-Saharan Africa remains the lowest-performing region on the CPI, “showing little improvement from previous years and underscoring a need for urgent action”.
It said the region’s average corruption score is 32/100, which is still better than Nigeria’s 25 points.
Seychelles emerged best in Sub-Saharan Africa with 66 points, followed by Botswana (60) and Cape Verde (58).
At the bottom of the corruption index are Sudan (16), Somalia (12) and South Sudan (12).
TI said the 2020 corruption perception index (CPI) reveals that persistent corruption is “undermining health care systems and contributing to democratic backsliding amid the COVID-19 pandemic”.
“Countries that perform well on the index invest more in health care, are better able to provide universal health coverage and are less likely to violate democratic norms and institutions or the rule of law,” it said.
Delia Ferreira Rubio, the chairperson of TI, said COVID-19 is not only a health and economic crisis but also a “corruption crisis”.
“The past year has tested governments like no other in memory, and those with higher levels of corruption have been less able to meet the challenge. But even those at the top of the CPI must urgently address their role in perpetuating corruption at home and abroad,” she added.
The organisation recommended that to reduce corruption, governments must: strengthen oversight institutions, ensure open and transparent contracting to combat wrongdoing, defend democracy and promote civic space as well as publish relevant data and guarantee access to information.