Season 2: http://tvseriesfinale.com/tv-show/th...ratings-34461/
It's down a bit overall from last season, mainly because it actually premiered pretty high (for the CW), but then drpoed to 0.5's and 0.6's (in the 18-49 demo). It's been pretty stable since then, even thought it's also been up against Empire for the second half of this season (and Empire does really, really well, I think it's breaking records). I can understand why a lot of people left during those first few episodes of season 1, those were probably the worst episodes of the show (IMO).
I hope that there are more survivors from other parts of the Ark and that some of the characters meet up with them soon (at least by early next season).