The statement that 95% of the Universe is "dark" or "unknown" can be quite misleading if not properly qualified. It actually applies only at very large length scales (way beyond the largest structures in the Universe), and at a specific time (now) 1/5 
In the local Universe things are different: in a sphere centered around the Sun and radius equal to the Earth's orbit, the Universe is ~100% ordinary matter. In a sphere surrounding our Galaxy, the dominant component is dark matter, while dark energy is irrelevant👇2/5
Then there's time dependence: the contribution of dark matter and dark energy varied enormously during the history of the Universe, going from irrelevant right after the Big Bang to the current ~95% 3/5
Even looking at relatively recent epochs, the "dark" to "known" universe ratio has kept increasing, and will keep increasing in the future up to ~100%, due to the emergence of dark energy... 4/5
The simplest way to avoid confusion is to show the evolution of the physical density. Matter (bright or dark) gets diluted as universe expands. DE is (equivalent to) a form of energy that does NOT get diluted by expansion 5/5
References: Universe pie chart from sci.esa.int/web/planck/-/5…; ratio DM to baryons in MW extracted from arxiv.org/abs/1805.01408; all other plots created with #astropy astropy.org
More information about the astropy.cosmology sub-package at docs.astropy.org/en/stable/cosm…
