  We describe the 44 systems discovered to be within 10 parsecs of the Sun by
the RECONS team, primarily via the long-term astrometry program at CTIO that
began in 1999. The systems --- including 41 with red dwarf primaries, 2 white
dwarfs, and 1 brown dwarf --- have been found to have trigonometric parallaxes
greater than 100 milliarcseconds (mas), with errors of 0.4--2.4 mas in all but
one case. We provide updated astrometric, photometric (VRIJHK magnitudes),
spectral type, and multiplicity information here. Among these are 14 systems
that are new entries to the 10 parsec sample based on parallaxes measured at
the CTIO/SMARTS 0.9m telescope. These are the first parallaxes for nine
systems, while the remaining five systems had previously measured parallaxes
with errors greater than 10 mas or values placing them beyond 10 parsecs. We
also present parallaxes from URAT for seven of these systems, providing
additional evidence that they are closer than 10 parsecs. In addition, we
provide new data for 22 systems that were previously known to lie within 10
parsecs and 9 systems reported to be closer than that horizon but for which new
parallaxes place them further away. In total, we provide data for 75 systems,
for which 71 have new or updated parallaxes here.
  The 44 systems added by RECONS comprise one of every seven systems known
within 10 parsecs. We illustrate the evolution of the 10 parsec sample from the
191 systems known when the final Yale Parallax Catalog (YPC) was published in
1995 to the 316 systems known today. Even so close to the Sun, additional
discoveries of red and brown dwarfs (and perhaps even white dwarfs) are likely,
both as primaries and secondaries, although we estimate that at least 90% of
the stellar systems closer than 10 parsecs have now been identified.
