Table 11. Percentages of “social science” related keywords from all keywords in relation to the final article classifications.

	Average percentage of social science keywords
Final article classification	1990–1994	2000–2004	2010–2014	Grand Total
clearly natural sciences	22%	8%	9%	12%
most likely natural sciences	23%	16%	24%	22%
maybe multidisciplinary	35%	20%	42%	36%
probably multidisciplinary	26%	22%	56%	44%
most likely multidisciplinary		80%	42%	50%
most likely social sciences	34%	52%	51%	49%
clearly social sciences	42%	28%	48%	43%
Grand Total	29%	23%	26%	26%