counting blocks in drawings

Hi all.

I need to insert a table in paperspace tab that will continually count up blocks within a set area of model space ( i need to have 3 counts, 1 for each floor of a house i.e one table per tab for that floors blocks). I have used BCOUNT and DATAEXTRACTION but they only count it once and if i add more of a certain block it does not update the table.

Hope this makes sence??

im using AutoCAD 2012

Thanks

Jon

I think you could does this using a FIELD.