Worldwide orthopaedic research activity 2010-2014: Publication rates in the top 15 orthopaedic journals related to population size and gross domestic product

Table 4 Number of publications (PSPP) and impact (PSPI) normalized for population size (publication/impact point per in thousand populations)

Rank	Country	PSPP	Rank	Country	PSIP
1	Switzerland	15.3	1	Switzerland	5.4
2	Norway	21.1	2	Norway	6.7
3	Denmark	22.3	3	Holland	7.8
4	Sweden	24.1	4	Denmark	7.9
5	Holland	25.4	5	Sweden	8.2
6	Austria	28.7	6	Austria	10.6
7	Finland	32.3	7	Canada	12.1
8	Canada	35.9	8	Luxemburg	12.6
9	Luxemburg	38.9	9	United States	12.9
10	South Korea	38.9	10	United Kingdom	13.4
11	United Kingdom	38.9	11	Finland	13.4
12	United States	39.3	12	South Korea	13.6
13	Australia	44.3	13	Australia	15.2
14	Belgium	51.1	14	Belgium	18.2
15	Hong Kong	55.3	15	Singapore	18.3
16	New Zealand	57.3	16	Hong Kong	19.4
17	Croatia	57.8	17	New Zealand	19.7
18	Greece	60.4	18	Greece	21.6
19	Germany	63.1	19	Germany	23
20	Singapore	64.3	20	Slovenia	24
21	Slovenia	64.3	21	Ireland	24.3
22	Ireland	65.1	22	Israel	25.6
23	Israel	67.7	23	Croatia	27
24	Italy	82.4	24	Italy	30.7
25	Japan	86.8	25	Japan	31.4
26	Taiwan	88.4	26	Taiwan	32
27	Iceland	107.7	27	Iceland	46.1
28	France	121.5	28	France	48.1
29	Spain	151.9	29	Spain	56.7
30	Estonia	185.7	30	Estonia	76.5
31	Czech Republic	269.2	31	Turkey	121.7
32	Turkey	326.2	32	Czech Republic	125
33	Lithuania	333.3	33	Lithuania	130.4
34	Hungary	341.4	34	Hungary	139.4
35	Serbia	379.5	35	Portugal	147.3
36	Portugal	418.4	36	Serbia	167.7
37	Lebanon	551.8	37	Lebanon	215.9
38	Poland	631.6	38	Chile	247.6
39	Kuwait	673.8	39	Poland	272
40	Chile	680.8	40	Kuwait	374.3
41	China	1110.5	41	Iran	443.5
42	Egypt	1176.5	42	China	447.3
43	Iran	1187.3	43	Malaysia	471.7
44	Thailand	1283.1	44	Egypt	476.2
45	Malaysia	1292.1	45	Brazil	491.2
46	Brazil	1363.2	46	Thailand	521.2
47	Argentina	2072.5	47	Argentina	753.6
48	Tunisia	2178.0	48	South Africa	915.2
49	Saudi Arabia	2402.5	49	Tunisia	990
50	Bulgaria	2421.7	50	Saudi Arabia	12108.3
51	South Africa	2571.4	51	Bulgaria	15353.8
52	Romania	3326.7	52	Romania	15353.9
53	India	5089.4	53	India	19380.8
54	Malawi	8180.0	54	Malawi	32720
55	Ethiopia	9410.0	55	Columbia	43649
56	Columbia	9602.8	56	Mexico	45536.5
57	Iraq	11140	57	Nepal	55600
58	Mexico	11839.5	58	Iraq	55700
59	Nepal	13900	59	Russia	68333.3
60	Russia	15944.4	60	Uganda	75160.0
61	Morocco	16505	61	Philippines	75684.6
62	Philippines	19678	62	Morocco	82525.0
63	Nigeria	24800	63	Nigeria	115733.3
64	Pakistan	32695.7	64	Sudan	126533.3
65	Uganda	37580	65	Pakistan	163478.3
66	Sudan	37976	66	Ethiopia	313666.7