London (CNN) Last year was the world's most miserable for more than a decade, according to a survey of people's emotions in more than 145 countries.

People experienced sadness, stress, worry, anger and physical pain more frequently in 2017 than in previous years, according to Gallup's annual Global Emotions Report.

The results mean the world is more "negative" than at any point since the polling company started the study in 2005.

In a year dominated by war, political division and humanitarian crises, nearly four in 10 people told pollsters that they experienced stress or worry the previous day.

One in five people reported feeling anger, while 23% experienced sadness and 31% suffered physical pain.

An armed militiaman stands guard in the majority Muslim district of Bangui, Central African Republic.

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