I know the wall's purpose and agree with it. Is there any hard data as to suicide bombings before and after its erection? I heard that suicide bombings virtually halted, but that was just hearsay. If so, a mighty good legacy, PM Sharon.
The IDF keeps these statistics available for the world to see. I don't know where to find 2005 statistics yet.
http://www1.idf.il/dover/site/mainpage.asp?sl=EN&id=22&docid=16703
Here are 2005's statistics
http://www.mfa.gov.il/MFA/Terrorism-+Obstacle+to+Peace/Terrorism+and+Islamic+Fundamentalism-/2005+Terrorism+Review.htm