Charge of clicks increased drastically!!

[rainbowstore]

Till last month we were paying around $0.50-$0.85 per click in our niche (life style)

But since the new year began click rates have increased drastically from $5 to even $16 or so.

I know that if bidders bid high then click rates will increase but I am checking correspondingly my adwords account too. There has been any such event.