A snapshot of pneumonia research activity and collaboration patterns (2001–2015): a global bibliometric analysis

Table 3 Top 15 countries and world regions ranked according to population index, GDP index, GNI per capita index, R&D expenditure index and Researchers in R&D Index^b,a

Country^a	Population Index^b	Country	GPD Index^c	Country	GNI per capita Index^d	Country	R&D expenditure Index^e	Country	Researchers in R&D Index^f
Switzerland	70.32	Gambia	30.83	USA	18.31	USA	3276.91	USA	2.25
Netherlands	55.23	Malawi	9.27	China	14.08	Spain	1056.90	India	1.84
Iceland	51.70	Uganda	3.42	India	8.25	UK	993.78	Uganda	1.39
Denmark	50.54	Guinea Bissau	2.62	Malawi	5.19	China	735.50	China	1.22
Finland	40.77	Andorra	1.94	Brazil	4.83	Italy	731.10	Malawi	1.16
Belgium	37.29	Kenya	1.88	UK	4.67	France	712.03	Brazil	1.06
Sweden	35.94	Vanuatu	1.78	Japan	4.54	Germany	589.28	Tanzania	0.78
Israel	35.05	Cambodia	1.60	France	4.40	Canada	579.61	Cambodia	0.67
Australia	34.24	Nepal	1.55	Spain	4.20	Brazil	557.01	South Africa	0.62
Canada	32.71	Grenada	1.35	Germany	4.06	Turkey	532.13	Italy	0.54
USA	28.78	Israel	1.26	Uganda	4.04	Netherlands	500.78	Philippines	0.53
Spain	27.90	Papua N Guinea	1.26	Bangladesh	3.07	Japan	493.90	Colombia	0.52
Greece	26.84	Mozambique	1.25	Canada	2.89	Greece	448.47	Mozambique	0.52
UK	26.32	Netherlands	1.22	Kenya	2.86	Thailand	445.07	Turkey	0.51
New Zealand	25.65	Tunisia	1.19	Italy	2.59	Gambia	423.33	Ghana	0.50

^a Monaco has a population index of 112.42 and Andorra, 75.86; these countries were excluded due to their especially small size and population ^b Number of publications per million inhabitants
^c Number of publications per 1 billon US dollars of gross domestic product (GPD)
^dNumber of publications per 100 USD dollars of gross national income (GNI) per capita
^e Numbers of publications per % of GDP expenditure in Research and Development (R&D)
^f Numbers of publications per researcher per million inhabitants

ISSN: 1471-2288