  The Large Volume Detector (LVD) has been continuously taking data since 1992
at the INFN Gran Sasso National Laboratory. LVD is sensitive to neutrino bursts
from gravitational stellar collapses with full detection probability over the
Galaxy. We have searched for neutrino bursts in LVD data taken in 7335 days of
operation. No evidence of neutrino signals has been found between June 1992 and
December 2013. The 90% C.L. upper limit on the rate of core-collapse and failed
supernova explosions out to distances of 25 kpc is found to be 0.114/y.
