  Using the updated exoplanet population parameters of our previous study,
which includes the planetary radius updates from Gaia DR2 and an inferred
multiplicity distribution, we provide a revised $\eta_{\oplus}$ calculation.
This is achieved by sampling planets from our derived population model and
determining which planets meet our criterion for habitability. To ensure robust
results, we provide probabilities calculated over a range of upper radius
limits. Our most optimistic criterion for habitability provides an
$\eta_{\oplus}$ value of $0.34\pm 0.02 \frac{\rm planets}{\rm star}$. We also
consider the effects of multiplicity and the number of habitable planets each
system may contain. Our calculation indicates that $6.4\pm0.5\%$ of GK dwarfs
have more than one planet within their habitable zone. This optimistic
habitability criterion also suggests that $0.036\pm0.009\%$ of solar-like stars
will harbor 5 or more habitable planets. These tightly packed highly habitable
system should be extremely rare, but still possible. Even with our most
pessimistic criterion we still expect that $1.8\pm0.2\%$ of solar-like stars
harbor more than one habitable planet.
