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Table 1. 
Summary of the amount of data analyzed for each country. The last three columns are for field/country combinations with at least 50 articles in 1996 and at least 50 in 2012 (Total = 4,968 successful regressions)
CountryArticlesFieldsFull modelReduced modelArticles 50Fields 50Full model 50Reduced model 50
Australia 374,052 330 308 310 236,595 91 90 91 
Canada 509,478 328 310 313 401,210 148 148 148 
Ireland 42,872 321 222 250 
New Zealand 64,818 324 239 259 9,763 
United Kingdom 937,390 328 319 321 839,293 199 199 199 
United States 4,553,110 331 325 324 4,488,242 291 290 291 
Total 6,481,720    5,975,103    
CountryArticlesFieldsFull modelReduced modelArticles 50Fields 50Full model 50Reduced model 50
Australia 374,052 330 308 310 236,595 91 90 91 
Canada 509,478 328 310 313 401,210 148 148 148 
Ireland 42,872 321 222 250 
New Zealand 64,818 324 239 259 9,763 
United Kingdom 937,390 328 319 321 839,293 199 199 199 
United States 4,553,110 331 325 324 4,488,242 291 290 291 
Total 6,481,720    5,975,103    
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