When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.64426, author = "{CMS Collaboration}", title = "{Measurement of jet multiplicity distributions in t t-bar production in pp collisions at $\sqrt{s}$ = 7 TeV}", howpublished = "{HEPData (collection)}", year = 2014, note = "\url{https://doi.org/10.17182/hepdata.64426}" }

or, if you prefer, a specific version of the record:

@misc{hepdata.64426.v1, author = "{CMS Collaboration}", title = "{Measurement of jet multiplicity distributions in t t-bar production in pp collisions at $\sqrt{s}$ = 7 TeV (Version 1)}", howpublished = "{HEPData (collection)}", year = 2014, note = "\url{https://doi.org/10.17182/hepdata.64426.v1}" }

You can also cite this table directly.

@misc{hepdata.64426.v1/t6, author = "{CMS Collaboration}", title = "{``Table 6'' of ``Measurement of jet multiplicity distributions in t t-bar production in pp collisions at $\sqrt{s}$ = 7 TeV'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2014, note = "\url{https://doi.org/10.17182/hepdata.64426.v1/t6}" }