English: More than a century of rainfall data in the Sahel show an unusually wet period from 1950 until 1970 (positive index values), followed by extremely dry years from 1970 to 1990 (negative index values). From 1990 until present rainfall returned to levels slightly below the 1898–1993 average, but year-to-year variability was high.
Deutsch: Abweichung der Sahelzonen-Niederschlagsmenge vom Mittelwert des 20. Jahrhunderts.Der Zeitraum 1950-1970 war ungewöhnlich feucht(positive Werte), der Zeitraum 1970 bis 1990 extrem trocken (negative Werte).
{{Information |Description={{en|1=More than a century of rainfall data in the Sahel show an unusually wet period from 1950 until 1970 (positive index values), followed by extremely dry years from 1970 to 1990 (negative index values). From 1990 until 2004