The number of 'inner' tracks accpeted by ZXFIND for the day's
processed events that have no VXD links.
Inner tracks are those which project inside the vertex
detector. These events have no VXD hits linked to them.
Events used are those whose processing finished that day.
(description supplied by R.Dubois)
The data is read from Oracle SLD.OFFLDAY.NTK_INN_NVXD
