My original comment was really trying to get at the human factors involved as to why we don't care. We just seem to be bad at responding to trends but better at responding to single events. Just like how the US generally don't care about the 40k+ USians killed every year in traffic accidents, but the US responded strongly to the singular event that was 9/11.
Edit: care about on an emotional, popular media level. Deaths per vehicle mile traveled have been going down over time in the US, due to increased safety regulations imposed on the manufacturers.