Again, right over your head.
It isn't just about gun incidents, which your chart is really vague on the individual incidents, it's about personal responsibility like being able to protect your family and yourself when someone threatens you. It takes an average of 5-8 minutes for police to arrive after a 911 call. It takes seconds to be shot to death. I'm not waiting on the cops to show up to decide whether or not I survive.
Bad things happen with guns, I'm not doubting that. Most mass shootings happen in gun free zones. That's also a fact. But the United States is the best country in the world when it comes to personal protection and the laws that promote it. That's also a fact.
If you really think that if the government took away all the guns, bad guys would not have guns, you're either ignorant about it, or you're knowingly and purposely trying to manipulate people to give into your agenda.