In Norway the oil and gas sector produces 23% of GDP. In the UK the financial services sector produces 10% of GDP. In Canada, a sector like Professional, scientific and technical services produces 5% of GDP.
ibuprofen will exit your system in 12-24 hours, depending on your body. the dosage doesn't effect time in your system, it just effects the potency of the drug during its duration i your body. so it may only take 12 hours to get out of your body, and the 600mg is just telling you how strong it will be in your body.
There are two ways of approaching this question: one of how long is it effective in your system (providing the effects for which you took the drug) and the other of how long until it is eliminated. Effectiveness: The half-life of ibuprofen (the time after which half the dose has been eliminated) is about 2 hours.