According to IE website SVG is supported. And according to this answer too What are SVG (Scalable Vector Graphics) supported browsers?
http://jsfiddle.net/jitendravyas/2
IE seems to be mishandling the missing preserveAspectRatio attribute. You can get it to scale in IE by adding preserveAspectRatio="xMinYMin slice"
as seen here:
http://jsfiddle.net/2UWNe/4/show
However, what IE is showing is not the correct behavior, and thus this change causes other browsers to behave differently than IE. (Microsoft, however, believes that they support preserveAspectRatio.)
I haven't looked deeply at your units or content bounding boxes. What effect are you really trying to achieve?