The 32 most corrupt countries in the world

Zimbabwe Protest
Protesters calling for Zimbabwean President Robert Mugabe to step down cheer in front of a military vehicle in Harare, Zimbabwe, in November 2017. REUTERS/Philimon Bulawayo

The World Economic Forum on Tuesday released its annual corruption index as part of its "Global Competitiveness Report."

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Using a methodology linked to Transparency International's Corruption Perception Index, the WEF ranked 140 countries' level of corruption within their society on a scale of one to 100.

A score of 100 means a country is without corruption, while zero is the most corrupt possible. All the countries featured on this list scored 30 or less.

The countries the WEF views as most corrupt tend to be in Africa, Central America, and the Middle East, in societies with weak legal and governmental systems and widespread poverty.

For instance, the WEF ranked Yemen, which is in the middle of a brutal civil war, as the most corrupt nation. But a handful of the world's 20 largest economies also made it onto the list.

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Check out the world's most corrupt nations below.

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T29. Sierra Leone — 30

Sierra Leone
Riot police in the streets of Sierra Leone's capital, Freetown, in September 2007. REUTERS/Katrina Manson

T29. Iran — 30

Iranian special forces
Iran's special forces marching during the annual Army Day parade near the Khomeini shrine in southern Tehran. Morteza Nikoubazl/Reuters
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T29. Ukraine — 30

ukraine flag military
A Ukrainian serviceman at a checkpoint near the town of Horlivka, in eastern Ukraine, in September 2014. REUTERS/David Mdzinarishvili

T29. Gambia — 30

Members of Gambia's Army forces are seen in a statdium in Banjul, Gambia December 5, 2016. Picture taken December 5, 2016. REUTERS/ Thierry Gouegnon
Gambia's Army forces in a stadium in Banjul, Gambia. Thomson Reuters
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T22. Russia — 29

russian flag
Matthew Stockman / Getty

T22. Paraguay — 29

paraguay sports fan kid celebration soccer
Reuters/Stringer
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T22. Mexico — 29

Mexico
Diego Grandi/Shutterstock

T22. Laos — 29

laos
Laos girls in ancient dress parade during the Songkran festival in April 2008 in Luang Prabang, Laos. Chumsak Kanoknan/Getty Images
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T22. Kyrgyzstan — 29

Kyrgyzstan
Reuters

T22. Dominican Republic — 29

dominican republic celebrates at world baseball classic
The Dominican Republic celebrates at the World Baseball Classic in 2013. Thearon W. Henderson/Getty Images
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T22. Honduras — 29

Honduras
People at a march in Tegucigalpa in July 2015 to demand the resignation of Honduran President Juan Orlando Hernandez. REUTERS/Jorge Cabrera

T19. Guatemala — 28

Guatemala flag
Reuters/Stringer
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T19. Bangladesh — 28

bangladesh flag world record
Andrew Biraj/Reuters

T19. Mauritania — 28

SNIM Mauritania
REUTERS/Joe Penny
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T17. Lebanon — 28

Lebanon
Lebanese flag flies outside of Tripoli Jerry Lampen/ Reuters

T17. Kenya — 28

kenya
Kenyan police clashing with a protester. Goran Tomasevic/Reuters
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T15. Guinea — 27

Guinea public dump
Children scavenge at a public dump in Malabo in January 2012. Reuters

T15. Nigeria — 27

Nigeria GDP
Getty Images
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T13. Uganda — 26

uganda shops
Flickr/Tore

T13. Nicaragua — 26

Nicaragua
Reuters/Oswaldo Rivas
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T11. Cameroon — 25

cameroon boko haram
A member of a civilian vigilante group and a woman pumping water into jerrycans in Kerawa, which is on the border with Nigeria and subject to frequent attacks by the militant group Boko Haram. REUTERS/Joe Penney

T11. Mozambique — 25

mozambique flag
Mozambique's national flag is seen in Maputo November 21, 2005. Thomson Reuters
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T8. Haiti — 22

Demonstrators hold up Haitian flags and shout as the motorcade of U.S. President Donald Trump passes in West Palm Beach, Florida, U.S., January 15, 2018.  REUTERS/Kevin Lamarque
Demonstrators hold signs and Haitian flags as a motorcade with US President Donald Trump motorcade passes in West Palm Beach, Florida, in January. Thomson Reuters

T8. Burundi — 22

burundi nkurunziza
Burundi's president, Pierre Nkurunziza. Evrard Ngendakumana/Reuters
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T8. Zimbabwe — 22

Zimbabwe Protest
Protesters calling for Zimbabwean President Robert Mugabe to step down cheer in front of a military vehicle in Harare, Zimbabwe, in November 2017. REUTERS/Philimon Bulawayo

T5. Democratic Republic of Congo — 21

Democratic Republic Congo army
Soldiers from the Armed Forces of the Democratic Republic of Congo near the town of Kimbau in February. Reuters
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T5. Cambodia — 21

us embassy cambodia
A man holding a Cambodian flag outside the US Embassy in Phnom Penh. REUTERS/Samrang Pring

T5. Tajikistan — 21

dushanbe tajikistan
People walk along the street as a motorcade ferrying U.S. Secretary of State John Kerry drives past on November 3, 2015 in Dushanbe. Kerry is travelling to Tajikistan and Turkmenistan on the last day of his travels in the region as he visits 5 Central Asian nations. REUTERS/Brendan Smialowski/Pool Brendan Smialowski/Pool/Reuters
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4. Chad — 20

chad
A Chadian soldier on a pickup truck next to a bag of rocket-propelled grenades in Gambaru in 2015. Emmanuel Braun/Reuters

3. Angola — 19

Angola flag
Reuters/Claudia Daut
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2. Venezuela — 18

venezuela protestor flag
A Venezuelan protester in front of a burning barricade during riots in Caracas in March 2004. REUTERS/Jorge Silva

1. Yemen — 16

yemen
An armed Houthi follower at a rally against Saudi-led airstrikes in Sanaa in June 2015. Reuters
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