  Many X-ray binaries are transiently accreting. Having statistics on their
recurrence times is helpful to address questions related to binary evolution
and populations, as well as the physics of binary systems. We compile a catalog
of known outbursts of neutron star (identified through bursts or pulsations)
low-mass X-ray binaries, until late 2023. Most outbursts are taken from the
literature, but we also identify some outbursts from public X-ray monitoring
lightcurves. We find 109 outbursts not previously identified in the literature;
most are from the frequent transients GRS 1747-312 and the Rapid Burster MXB
1730-335, though we suspect that two outbursts from Liller 1 may be from
another transient, besides the Rapid Burster. We also find new outbursts for 10
other systems, and verify substantial quiescent intervals for XMM
J174457-2850.3, XMMU J174716.1-281048, and AX J1754.2-2754. Outburst detection
has been relatively efficient since 1996 for outbursts above
$F_X$(2-10)$=3\times10^{-10}$ ergs/s/cm$^2$. While several systems have many
known outbursts, 40 of the 85 systems we track have zero or one recorded
outburst between 1996 and 2023. This suggests that faint Galactic Center X-ray
binaries may be neutron star X-ray binaries, though we cannot completely rule
out the proposition that most neutron star X-ray binaries undergo frequent
outbursts below all-sky monitor detection limits.
