The Accelerator Content files (Reference Tables) are only updated with major/minor releases i.e. 9.6.0, 9.6.1 etc. so if it was the 9.6.1 Accelerator pack you imported then you have latest data.
As addition to the reply from Robert :
Unlike the AddressDoctor country reference data, which needs to be updated on a regular basis, the Accelerator Content does not change that much.
You need to submit a shipping request.
There is one free available Data Quality Accelerator called IDQContent9xx.zip what is available for all IDQ customers.
The country specific Data Quality Accelerator for
USA & Canada
are not free of charge.
They include specific content tables, mapplets and rules.
They will save you probably more time than they do cost.(You do not have to invent the wheel again)