(Optional) Contains the trigger starting event number.
The starting event number indicates the first event during the year that the software applies the terms of the reinsurance layer to.
The software counts only the events that could potentially produce reinsurer losses toward the starting event number.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2