2.1.1629 Part 4 Section 18.104.22.168, ST_DepthPercent (Depth Percent)
a. The standard states the ST_DepthPercent simple type has a minimum value of greater than or equal to 1.
Office saves but does not load values that are less than 20.
This note applies to the following products: 2007, 2007 SP1, 2007 SP2.