In the period March 20, 2003 through May 31, 2003 (declared by the Shrub and his Forty Theives of Baghdad to be the end of major combat), there were 173 "Coalition" deaths, an average of just over 4 per day.
In the period June 1, 2004 through June 28, 2004, there were 803 Coalition deaths, an average of just under two per day.
In the period June 29, 2004 through January 30, 2005, there were 631 Coalition deaths, an average of just under three per day. (This was the period in which the Marines fought a prolonged engagement in Falluja against Sunni insurgents).
In the period January 31, 2005 through December 13, 2005, there were 746 Coalition deaths, an average of less than two and one half per day.
In the period December 14, 2005 through October 13, 2006, there were 649 Coalition deaths, an average of just over two per day.
Source at Iraq Coalition Casualty Count, based on Department of Defense figures.
During this same period of time, the Shrub's approval rating has plummeted, and public criticism of his handling of the war has grown. The thesis that criticism of the administration endangers the troops in Iraq is not supported by the available data.