There can be many markets where IE usage is much higher than the worldwide average. My previous job had IE as a whole with ~60% share. You can't just decide to ditch a browser because of averages, you need to look at your own data.

Corporate Intranet: within epsilon of 100% IE 8, at the moment. My current job and the last one always had some outdated version of Internet Exploder as the desktop standard (which I ignored for running anything other than in-house junk -- no way I'm taking MSIE out into the wild)