The can be accessed by anyone with Administrator permissions:
Click the Administration menu
Double Click Audit List
Now specify the date range to search the Audit Trail
Select a From Date
Select a To Date
Click Refresh
The screen will show all audit records between these two dates with the bottom of the screen showing the before and after values.
This data can then be exported to .csv file by clicking the Export button, where you can then analyse in a third party product.