Data were normalized by sum and autoscaled.

If you average 10, 20 and 24, you get 18.

1837, “Law Proceedings”, in The Nautical Magazine and Naval Chronicle, for 1837. A Journal of Papers on Subjects Connected with Maritime Affairs, London: Simpkin, Marshall, and Co., Stationers' Hall Court, OCLC 889950828, page 269:

The decision of one senior traditional owner to stand outside the negotiation process militated against an even more favourable outcome.