Table 2.

The most relevant countries.

Country	Articles	SCP	MCP	Freq	MCP_Ratio
USA	128	94	34	0.149	0.266
CHINA	125	71	54	0.145	0.432
INDIA	101	84	17	0.117	0.168
UNITED KINGDOM	29	12	17	0.034	0.586
KOREA	22	18	4	0.026	0.182
AUSTRALIA	21	14	7	0.024	0.333
GERMANY	19	12	7	0.022	0.368
CANADA	17	11	6	0.020	0.353
SPAIN	14	7	7	0.016	0.500

Note: *SCP-Single Country Publication, MCP-Multiple Country publication.