There are obvious reasons why spending would differ like this – the US accounted for more than half of the combined GDP of all NATO members in 2020, for example, and has military commitments around the world, so a high NATO spend makes sense.
Defence spending by European NATO members and Canada has been increasing in recent years.
Despite the impact of the pandemic, countries increased spending on defence in 2020 for the sixth year running.
The current agreed target for European NATO members is two percent of GDP on defence by 2024.
President Trump had urged the other countries in the alliance to increase that to four percent of GDP.