John Deni, the author, is sharp in using key cases to make the 2% standard look foolish. By that measure, Greece looks great and the Danes not so much. But Afghanistan and Libya, the Greeks did little and then none while the Danes did much. So any metric that focuses on what countries do as part of the NATO alliance will favor the Danes and denigrate the Greeks. The Canadians would find their ranking rise as well.
While caveats are not everything, our research does show a fairly consistent division between do-ers/risk-bearers and the rest:
The key point here is: rankings, like love, are a many splendored thing.... or something.