The United States is by far NATO’s most powerful member. It spends more on defence than all the others combined. The U.S. spent 3.61 per cent of American GDP last year, according to NATO estimates — a level that has somewhat tapered off in recent years.

Germany, by contrast, spent 1.19 per cent of its overall budget on defence. Ten countries spend even less, and seven — including Canada, Italy and Spain — would have to virtually double military spending to reach the target. One, Luxembourg, would require a four-fold increase to get close.
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Some sort of misleading actually. For American, the spending is mostly spent domestically, thus boosting your own GDP. For others, they will have to buy more weapons from US, thus to cut their own GDP.
That is totally different.