That would be the slowest expansion rate in a decade.

The factor 1/3 in the expansion rate term should be replaced by 1/2 in that case.

There are dynamical forces acting on the particles in the universe which affect the expansion rate.

In this case, the expansion rate of the universe will increase without limit.

With dark energy, the expansion rate of the universe initially slows down, due to the effect of gravity, but eventually increases.