  Considering a sample of 31 exoplanetary systems detected by gravitational
microlensing, we investigate whether or not the estimated distances to these
systems conform to the Galactic distribution of planets expected from models.
We derive the expected distribution of distances and relative proper motions
from a simulated microlensing survey, correcting for the dominant selection
effects that affect the planet detection sensitivity as a function of distance,
and compare it to the observed distribution using Anderson-Darling (AD)
hypothesis testing. Taking the relative abundance of planets in the bulge to
that in the disk, $f_{\rm bulge}$, as a model parameter, we find that our model
is only consistent with the observed distribution for $f_{\rm bulge}<0.54$ (for
a $p$-value threshold of 0.01) implying that the bulge may be devoid of planets
relative to the disk. Allowing for a dependence of planet abundance on
metallicity and host mass, or an additional dependence of planet sensitivity on
event timescale does not restore consistency for $f_{\rm bulge}=1$. We examine
the distance estimates of some events in detail, and conclude that some
parallax-based distance estimates could be significantly in error. Only by
combining the removal of one problematic event from our sample and the
inclusion of strong dependences of planet abundance or detection sensitivity on
host mass, metallicity and event timescale are we able to find consistency with
the hypothesis that the bulge and disk have equal planet abundance.
