Not sure where else to put this, but as of this post date, I am now Elite in Exobiology and this is the total profit from organic data. Not 8.4 Bn credits. Just before ranking Elite, I had 4.8 bn, and was Geneticist. The last turn in, that put me over was 115M (including bonuses).
My own path started at release of Ody, before the buff. Went through the nerf, got re-adjusted, sat at Geneticist 0% for a long time (despite continuing to chip away at it), eventually "caught up" to my rank, when total profits were somewhere over 1 bn, but under 1.5 bn, so long before the 3.9bn in the previous tables.
So, I conclude the tabulated values are out dated, and that the present targets are at about 50% (roughly) of what's shown here and in the wiki.