Table 1.

Top ten countries producing the largest number of publications in 1980, 1990, 2000, 2010, 2015, and 2018.

Rank198019902000201020152018
CountryPublications (‘000)CountryPublications (‘000)CountryPublications (‘000)CountryPublications (‘000)CountryPublications (‘000)CountryPublications (‘000)
1U.S.152U.S.274U.S.374U.S.609U.S.675U.S.695
2U.K.40U.K.67U.K.107China344China460China601
3Japan34Japan65Japan105U.K.176U.K.202U.K.215
4Germany33Germany51Germany91Germany154Germany175Germany184
5France22France37France64Japan130India142India175
6Canada16Canada32China52France109Japan128Japan134
7Italy15Italy28Canada46Canada92France122France123
8Australia10Australia16Italy45Italy87Italy113Italy122
9India10Netherlands16Russia35India81Canada106Canada113
10Netherlands7India15Spain31Spain74Australia96Australia106
Note: China was ranked 39 th in 1980 with 629 publications; it was ranked 13 th in 1990 with 11,211 publications.

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