The dynamic growth of the oil and gas sector inevitably reduces the shares of other sectors in GDP, and potentially their absolute size. The government has been proactive in combating these trends, investing the National Fund revenues overseas to limit exchange rate appreciation and consequent Dutch Disease effects and promoting economic diversification by a variety of well-funded policies. One expectation is that non-traded goods sectors will expand, and this was apparent in the construction boom and real estate bubble, which burst in 2007.