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.
In addition, they are both available over-the-counter in low doses and via prescription in higher doses. However, the effects of ibuprofen do not tend to last as long as Aleve, so you may have to take it every four to six hours (up to six times a day). Aleve only has to be taken up to three times a day, or every eight hours.