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Historical Values
Year Value
2008 8 cu km (1982)
2009 8 cu km (1982)
2010 8 cu km (1982)
2011 8 cu km (1982)
2012 8 cu km (1982)
2013 8 cu km (2011)
2014 8 cu km (2011)
2015 8 cu km (2011)
2021 8 billion cubic meters (2017 est.)
2022 8 billion cubic meters (2017 est.)
2023 8 billion cubic meters (2020 est.)
2024 8 billion cubic meters (2020 est.)
2025 8 billion cubic meters (2022 est.)