Atp Calendar 2009 Ranking Points?

I have searched for it on the internet, but found no useful information. can anybody please clear the confusion and give me some dependable source as to what the ranking points will be in the year 2009 onwards. I know about the whole Masters 1000 and other tournaments but the grand slam points are not clear. Will they be 2000? same as Masters 1000? or what. Please qoute the source . thanks.