Evo 2013 HD Stream Bitrate?

Does anyone have any previous figures from the Evo 2012 HD Stream? I have limited data, so streaming HD for over 36 hours might be too much. If not, can anyone provide what the bitrate is and I can calculate how much it would be for the Evo weekend.

The 720p+ (highest on twitch) will be set to max at 4000kb of course this fluctuates due the nature of x264 but expect it to hover around that range consistently throughout the weekend.