I started looking into this because... I started thinking of who debuted this year and couldn't think of anyone. Last year there were some groups I noticed straight away, but this year... Wut? Anyway, according to wikipedia some groups HAVE debuted this year, so let's do some research, shall we?
Subgroups not included!
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Hip hop boyband)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Boyband, only a song available)
Delight (Girl group)
Sorta fun.
[noembed][/noembed] (Male rapper duo)
[noembed][/noembed] (Comedy male group)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Mixed)
[noembed][/noembed] (Girl group)
HISTORY (Boyband)
I was about to give up on this song until the rhythm started.
ICONIZE (Male band)
Highlighted for being refreshing.
Ladies' Code (Girl group)
The only group besides Wassup that I'd actually heard of before this.
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Male band PUNK RAWK)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Boyband)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Girl group)
[noembed][/noembed] (Girl duo)
[noembed][/noembed] (Girl group)
26 debuts listed here by mid-August; there were 84 in total on my list last year (wtf) so this is actually an improvement in numbers, that is, them going down.
Unfortunately, the quality has also gone down. lol
There are still 4 months to go till the end of the year so no doubt more debuts to come...