BTW - one thing that if you have taken a basic Finite math class you would know about statistics is that they have co-relations that must be taken into consideration. For example white and silver cars get into more accidents than any other color of car - well the corelation to this is that the two most popular colors in new cars are white and silver - so therefore it would figure that by the law of statistic that there are more of them out there - there is a greater chance of them getting into an accident. Rottweilers are well within the top 20 of most popular dogs (
http://www.futurepets.com/top50breeds.htm) # 13 to be exact - so could it just be comon sense because there are alot of them that there are more occurences - Again not sure if this can compute into the way you like to figure your statistic - but it's basic math