For the purposes of the final GFP ranking total tank strength totals include only Main Battle Tanks (MBTs) and not tank destroyers (TDs) and light tanks. Systems on order heading into the new year are NOT taken into account.
Tank strength data through 2017.
Sources: CIA.gov, CIA World Factbook, wikipedia.com, public domain print and media sources and user contributions. Some values may be estimated when official sources are lacking.