They haven't been perfectly stable, though. We've seen since 2005 a few cases of oil and gas prices surging upwards as part of the Russia-Ukraine dispute (in 20

They haven't been perfectly stable, though. We've seen since 2005 a few cases of oil and gas prices surging upwards as part of the Russia-Ukraine dispute (in 2005, 80% of all gas from Russia to the EU went through Ukraine).