Phobos midrapidity pseudorapidity densities versus centrality.  Au+Au at 200 GeV

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200GeV data - EOct Centrality Method (combined statistical and systematic errors)
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X-Sect	|	Npart	Error	|	dN/dEta	Error	|	dN/dEta/(Npt/2)	Error
50-55	|	49.1	5.0	|	73.0	5.5	|	2.98		0.38
55-60	|	37.1	4.2	|	53.5	4.0	|	2.88		0.39
60-65	|	27.6	3.4	|	38.3	2.9	|	2.78		0.40
65-70	|	20.0	2.6	|	26.8	2.0	|	2.68		0.40


more central data can be found here:

http://www.bnl.gov/phobos/Publications/Physics/AuAu_19_200_tracklet/200GeV_Basic.txt