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   dcterms:identifier "il-annual-lake-wide-average-water-levels-for-lake-michigan-huron";
   gcis:figureNumber "13.6"^^xsd:string;
   dcterms:title "Annual Lake-Wide Average Water Levels for Lake Michigan-Huron"^^xsd:string;
   gcis:hasCaption "\n	Long-term annual time series of the average water levels for Lake Michigan-Huron. Water levels in the Great Lakes have fluctuated widely over the years. Lake Michigan-Huron has shown a statistically significant downward trend over the past 150 years. The trend is largely due to the high levels early in the period and extremely low levels during the 21st century. Source: NOAA NOS and Canadian Hydrographic Service.\n\n"^^xsd:string;
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## Geographical extent of the figure content
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   gcis:southBoundLatitude "36.9701"^^xsd:float;
   gcis:eastBoundLongitude "-91.5129"^^xsd:float;
   gcis:westBoundLongitude "-87.4952"^^xsd:float;

## Temporal extent of the figure content
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   gcis:endedAt "2015-04-30T00:00:00"^^xsd:dateTime;

   a gcis:Figure, doco:Figure .




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## Person and his/her role in the creation of the entity:
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