During world war ii, about 1.8% of us soldiers were killed directly in battle. thid number went down to 0.5% at vietnam war. what was this number in the persian gulf war?

The American soldiers in the Persian Gulf war were 697,000 troops, New World Encyclopedia.org. indicated 147 deaths related to the Gulf War.

Question: Percentage of Killed American Soldier's  during the Gulf War

Given: 697,000 US Deployed US Soldiers during the war
            147 killed during the war

Solution:  Killed soldiers   x 100%  
                Total Number of US Soldiers

Percentage =          147___x     100%
                            697000 
                     
Answer         =0.002%

However, there are some arguments that tell that most of it came from a friendly fire.