Table 3.

Number of papers by countries as study settings.

Rank	Country Settings	Frequency	%	Rank	Country Settings	Frequency	%
1	United States	1394	20.6%	31	Poland	41	0.6%
2	Australia	672	9.9%	32	Chile	40	0.6%
3	India	329	4.9%	33	Malaysia	39	0.6%
4	United Kingdom	268	4.0%	34	Israel	38	0.6%
5	China	230	3.4%	35	Saudi Arabia	37	0.5%
6	Canada	222	3.3%	36	Thailand	36	0.5%
7	Ireland	204	3.0%	37	Switzerland	34	0.5%
8	Oman	197	2.9%	38	Singapore	33	0.5%
9	Brazil	177	2.6%	39	Indonesia	30	0.4%
10	Germany	140	2.1%	40	Wallis and Futuna	30	0.4%
11	Japan	131	1.9%	41	Colombia	29	0.4%
12	Mexico	128	1.9%	42	Viet Nam	29	0.4%
13	Iran	125	1.8%	43	Portugal	28	0.4%
14	New Zealand	125	1.8%	44	Bangladesh	27	0.4%
15	Spain	117	1.7%	45	Niger	25	0.4%
16	Netherlands	116	1.7%	46	Austria	23	0.3%
17	South Africa	107	1.6%	47	Georgia	23	0.3%
18	Sweden	88	1.3%	48	Kuwait	23	0.3%
19	Italy	86	1.3%	49	Nigeria	23	0.3%
20	Taiwan	66	1.0%	50	Argentina	22	0.3%
21	Greece	63	0.9%	51	Egypt	22	0.3%
22	Belgium	62	0.9%	52	Cuba	21	0.3%
23	France	62	0.9%	53	Czech	20	0.3%
24	Denmark	53	0.8%	54	Hungary	20	0.3%
25	Norway	53	0.8%	55	Bulgaria	18	0.3%
26	Turkey	46	0.7%	56	Jersey	18	0.3%
27	Finland	44	0.6%	57	Estonia	17	0.3%
28	Pakistan	44	0.6%	58	Guatemala	17	0.3%
29	Peru	43	0.6%	59	Lebanon	17	0.3%
30	Hong Kong	42	0.6%	60	Ghana	16	0.2%