  The energy dependence of multiplicity fluctuations was studied for the most
central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV by the NA49
experiment at the CERN SPS. The multiplicity distribution for negatively and
positively charged hadrons is significantly narrower than Poisson one for all
energies. No significant structure in energy dependence of the scaled variance
of multiplicity fluctuations is observed. The measured scaled variance is lower
than the one predicted by the grand-canonical formulation of the
hadron-resonance gas model. The results for scaled variance are in approximate
agreement with the string-hadronic model UrQMD.
