Using EndNote to conduct co-word analysis


I want to conduct co-word analysis based on the references in an EndNote library. I couldn’t find a software that can directly use the details of the references in the EndNote file to do such analysis. I tried to export all of the references to files with .bib extension and .ris extension. However, the keywords of the references were not extracted properly. Could anyone give me a suggestion to use a software or an export method so that I can apply co-word analysis using an EndNote file?

Thank you in advance!