In the Economy category, petroleum entries added for oil production, consumption, exports, imports, and proved reserves, as well as natural gas proved reserves.
2004
Bi-weekly updates launched on The World Factbook Web site. Additional petroleum entries included for natural gas production, consumption, exports, and imports. In the Transportation category, under Merchant marine, subfields added for foreign-owned vessels and those registered in other countries. Descriptions of the many forms of government mentioned in the Factbook incorporated into the Definitions and Notes.
2005
In the People category, a Major infectious diseases field added for countries deemed to pose a higher risk for travelers. In the Economy category, entries included for Current account balance, Investment, Public debt, and Reserves of foreign exchange and gold. The Transnational issues category expanded to include Refugees and internally displaced persons. Category headings receive distinctive colored backgrounds. These distinguishing colors are used in both the printed and online versions of the Factbook. Size of the printed Factbook reaches 702 pages.
2006
In the Economy category, national GDP figures now presented at Official Exchange Rates (OER) in addition to GDP at purchasing power parity (PPP). Entries in the Transportation section reordered; Highways changed to Roadways, and Ports and harbors to Ports and terminals.
2007
In the Government category, the Capital entry significantly expanded with up to four subfields, including new information having to do with time. The subfields consist of the name of the capital itself, its geographic coordinates, the time difference at the capital from coordinated universal time (UTC), and, if applicable, information on daylight saving time (DST). Where appropriate, a special note is added to highlight those countries with multiple time zones. A Trafficking in persons entry added to the Transnational issues category. A new appendix, Weights and Measures, (re)introduced to the online version of the Factbook.
2008