The official 2 percent threshold, while mandated at the 2014 Wales Summit, has long been understood as an unofficial spending target for NATO members. According to 2017 estimates illustrated in the graphic, only four of the 28 NATO member states meet the 2 percent spending level while 15 are expected to meet it by 2024..
The CSIS report compiles NATO member and partner countries’ troop contributions across a range of military operations. Where data was publicly available and reliable, it measures troop contribution as a percentage of the total active duty force to normalize and compare between countries with militaries of different size.
Conflict and instability to Europe’s south – in North Africa and in Syria – has generated population movements into Europe with which our allies have struggled. Some NATO members are bearing a particularly significant burden from the refugee crisis. Managing the crisis is a significant security investment for them and Europe as a whole.