Gaza’s economy has shrunk to less than a sixth of its size after Israel began its war on Gaza nearly a year ago, while unemployment in the illegally occupied West Bank has nearly tripled, a U.N. report said on Thursday, underscoring the challenges of reconstruction. The report by the United Nations Conference on Trade and Development (UNCTAD) described Gaza’s economy as “in ruins” more than 11 months after Israel launched a military campaign there that has reduced much of the Strip to rubble. The U.N. trade body said the Palestinian Authority (PA), which exercises limited self-rule under Israe…