I don't think the billboard charts are global.
For Australia -- They overall for the year charted at 52 in 2009 and 8 in 2010 (In terms of sales anyway).
From wikipedia: "The band's debut album, Sigh No More, was released in the United Kingdom in October 2009, and February 2010 in the United States."
It's nice to see Australia getting a media release before the US for a change. :)
