A 2015 report of the United Nations Conference on Trade and Development (UNCTAD) noted that between 2007 and 2013, more than 1,532 tunnels were running under the border to mitigate the impact of the blockade on Gaza. They were closed by mid-2013. The size of the tunnel trade was even greater than the volume of trade through official channels. The tunnels had been essential to recover from the destructions during the 2008/2009 Gaza War. Based on the materials allowed in by Israel, it would have taken 80 years to rebuild the 6,000 housing units destroyed during the military operation. Due to the tunnel imports, it only took 5 years. Gaza's sole power plant ran on diesel from Egypt brought through the tunnels in the range of 1 million litres per day before