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Historical Values
Year Value
1990 very few perennial streams
1991 very few perennial streams
1992 very few perennial streams
1993 very few perennial streams
1994 current issues: NA natural hazards: active volcanism on Tristan da Cunha international agreements: NA
1995 current issues: NA natural hazards: active volcanism on Tristan da Cunha international agreements: NA
1996 current issues: NA natural hazards: active volcanism on Tristan da Cunha international agreements: NA
1997 NA
1998 NA
1999 NA
2000 NA
2001 NA
2002 NA
2003 NA
2004 NA
2005 NA
2006 NA
2007 NA
2008 NA
2009 NA
2010 NA
2011 NA
2012 NA
2013 NA
2014 NA
2015 NA
2016 NA
2017 development threatens unique biota on Saint Helena
2018 development threatens unique biota on Saint Helena
2019 development threatens unique biota on Saint Helena
2020 development threatens unique biota on Saint Helena
2021 development threatens unique biota on Saint Helena
2022 development threatens unique biota on Saint Helena
2023 development threatens unique biota on Saint Helena
2024 development threatens unique biota on Saint Helena