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Table 2. 
Number of classified items of different types after initial reclassification. Percentage in parentheses is with respect to all such items with references
Subject category classificationBroad area classification
All typesArticles + conference proceedingsAll typesArticles + conference proceedings
Classifier items 20,286,801  29,853,395  
Classified items 41,132,197 (75%) 35,940,588 (79%) 43,847,374 (80%) 38,118,382 (84%) 
 multidisciplinary 3,719,208 (67%) 2,599,373 (56%)   
  multidisciplinary   science 896,169 (68%) 740,592 (69%) 909,543 (69%) 792,875 (74%) 
Subject category classificationBroad area classification
All typesArticles + conference proceedingsAll typesArticles + conference proceedings
Classifier items 20,286,801  29,853,395  
Classified items 41,132,197 (75%) 35,940,588 (79%) 43,847,374 (80%) 38,118,382 (84%) 
 multidisciplinary 3,719,208 (67%) 2,599,373 (56%)   
  multidisciplinary   science 896,169 (68%) 740,592 (69%) 909,543 (69%) 792,875 (74%) 
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