Soon came other disruptions, albeit smaller, caused by the Iranian revolution of 1979, the Iran-Iraq War of 1980 followed by the first Persian Gulf War in 1990–1991. Turbulences on the oil market that disturbed and endangered economies were also caused by the 2003 Iraq invasion, oil price spike of 2007-2008, Russian Ukrainian gas dispute in 2009, and others including smaller disruptions. Oil passages are still a global security concern as 40% of all oil transits via four conduits of the straits of Hormuz, Malacca, Rab-el-Mandeb and the Suez Canal. International Energy Agency (IEA) expects that these quantities will rise from 40% to 60% by 2030. Any longer interruption would cause another large-scale economic downfall.