Newcastle United transfer rumours are flying round thick and fast and that can only mean one thing - it's the Premier League's off-season. Yet, despite the Magpies having secured their top-flight future more than four weeks ago, Lee Charnley is yet to push a summer signing over the line. Seven weeks until the beginning of the 2015-16 Premier League season may seem like a long time, but in football terms that is barely any at all. The top priority for new Newcastle head coach Steve McClaren is to recruit a proven, quality striker. Ideally he wants to sign two forwards this summer - and at least one of those must be of the highest standard possible. Names such as Wolfsburg's Bas Dost, Queens Park Rangers' Charlie Austin and even West Ham United's Andy Carroll, formerly of Newcastle, have been linked with a move to St James' Park - but as of yet no new signings have been announced. And this all begs the question: Of all the forwards that have been linked with the Magpies this summer, who has the best goalscoring ratio? Current Newcastle forward Papiss Cisse - who is likely to leave the club this summer - has a career club average scoring ratio of 0.41 goals per match (132 goals in 321 games). So how do the others compare? Furthermore, Cisse netted 11 goals in just 22 appearances in all competitions in 2014-15, a strikerate of a goal every other game - and how do the others compare with that? So here are the 10 forwards most-heavily linked with a move to Newcastle United this summer ranked (from worst to best) in terms of their career club average goalscoring ratio (and then in terms of their 2014-15 goalscoring ratio)...