Mutually Exclusive Counts On Ordered Queries

Ive been playing with this for a few days and thought I might thow it
out for seggestions.

I have Several Queries that need counts returned

The Queries are Mutually Exclusive meaning whatever Query they return
in first they cannot be included in the counts of any queries below
them.

This set of queries for example


Select ID From Customers where FIRST_NAME = 'Chris' (would return say
150)

Select ID From Customers where ST='OH' (This would retunr say 50, BUT
Run alone it might return 70, however 20 of those were in the first
Query so they arent to be retunred in this result set.

The total for Bot Queries would be 200

But If I reverse it like so
Select ID From Customers where ST='OH' (This now returns 70)
Select ID From Customers where FIRST_NAME = 'Chris' (This now returns
130)

The total of course for BOT Queries is 200 but I dont need that total I
need the total for EACH Query depending on its ordering

What I need are the single counts depending on the order in which the
queries are run

It seems like a recursion problem, but It might go past 32 level so I
cant use recursive SQL ( I dont think )

I've thought of (or tried to think how to use Not In, Not Exist, etc
but still dosent come up with the results....)
How Can I grab the counts for each Query ?

Chris