Total Contacts - Insight Reporting - how to get real data?

I am not sure why there is no simple report about the current Total Contacts in Eloqua insight but every time I tried to find out how many Contacts do I have in database for a period of 1 year (monthly), so I get the astronomic data from Eloqua. Results could not even compare to the real numbers I see in a system. I think it is still calculating some deleted etx… why?

Do you know the easy way to get the simplest report ever like: how many Total Contact do I have in every month for last 1 year ? :)

Why it is so complicated in Eloqua :) ?