The database revisions are as follows:

database_agent (dir):	February 04, 2007
database_flag: 		October 18, 2006 (Source: http://www.phptutorial.info/iptocountry/the_script.html)
database_ip: 		January 10, 2009 (Source: http://www.phptutorial.info/iptocountry/the_script.html)
				(*) Note that all instances of "GB" in the above database must be replaced with "UK".
database_os: 		January 15, 2006
database_agent (file):	February 04, 2007
database_country: 	January 15, 2006