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Table 1 The top 100, 200, 300 keyword ratio and their frequencies

From: A bibliometric analysis of global forest ecology research during 2002–2011

Keywords number Keywords ratio Keywords frequencies Frequencies Ratio (%)
100 0.07%(100/150974) 173925 18.54%(173925/937923)
200 0.13%(200/150974) 233042 24.85%(233042/937923)
300 0.20%(300/150974) 271233 28.92%(271233/937923)