Independent research of China in Science Citation Index Expanded during 1980-2011.

J Informetr · 2013 · PMC7104961 · PMID 32288781

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a decreasing trendno p-value reported

3 shows that G7 countries published the majority of articles from 1980 to 2011, but their world share of articles showed a decreasing trend from 67% in 1980 to 53% in 2011.

also in 47,180 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.