The response covers all four countries and reports useful endpoint figures accurately. The overview overstates the continuity of the rankings: Nigeria leads in 2004, when Chad and Somalia tie. Nigeria rises overall despite an early decline, and production capability is not measured.
7.0Ideas progress logically from overview to detail, with larger producers grouped together and smaller producers compared separately. The connector introducing Congo’s decline is faulty, while the stacked participles in the final sentence make the sequence less direct.
7.0Vocabulary is flexible and appropriate for describing data, with items like 'fluctuated', 'gradually decreased', and 'sharply increasing', showing good range with only minor imprecision such as 'boosted its production capability'.
7.0GRAGrammatical Range and Accuracy
A wide range of structures, including participle phrases and complex sentences, is used with generally good control, and occasional errors remain non-impeding.
7.0