Table 3 Distribution of Studies...

Table 3

Distribution of Studies According to Years and the Countries of First Authors

Country	2011	2012	2013	2014	2015	Total
USA	25	31	52	29	12	149
Taiwan	5	11	12	9	9	46
Australia	4	9	10	14	7	44
Great Britain	2	12	6	9	6	35
Spain	4	7	8	10	5	34
Turkey	4	5	10	3	5	27
China	2	4	1	6	8	21
Canada	6	3	5	6	1	21
Malaysia	3	4	2	2	3	14
Greece	6	1	3	1	2	13
South Africa	1	1	1	4	4	11
South Korea	0	1	2	2	5	10
Other	27	17	24	20	31	102
Total	89	106	136	115	98	544