MUNICH, Germany (Reuters) – Over the past six months Gazprom has delivered gas to Europe at the lowest levels it could according to its contracts, European Commission President Ursula von der Leyen said on Saturday. “What we’ve seen over the last six months is that Gazprom has delivered always at the lowest level,” she told the Munich Security Conference. “They have to deliver by contract. They have contracts that say pay or deliver. So often they’ve chosen the payment instead of delivering gas, and the storage of Gazprom in our storage is at a 10-year low this year.” (Reporting by Sabine Sieb…