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.
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updated, moved title to top, added observational region as defined by the index, added units, changed bar graph to scatter plot (de-emphasizing the arbitrary zero level), added smoothed data as line (7-point cosine kernel).
{{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 prese
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