The State of Israel was declared in 1948, after Britain withdrew from its mandate of Palestine. The UN proposed partitioning the area into Arab and Jewish states, and Arab armies that rejected the UN plan were defeated. Israel was admitted as a member of the UN in 1949 and saw rapid population growth, primarily due to migration from Europe and the Middle East, over the following years. Israel fought wars against its Arab neighbors in 1967 and 1973, followed by peace treaties with Egypt in 1979 and Jordan in 1994. Israel took control of the West Bank and Gaza Strip in the 1967 war, and subsequently administered those territories through military authorities. Israel and Palestinian officials signed a number of interim agreements in the 1990s that created an interim period of Palestinian self-rule in the West Bank and Gaza. Israel withdrew from Gaza in 2005. While the most recent formal efforts to negotiate final status issues occurred in 2013-2014, the US continues its efforts to advance peace. Immigration to Israel continues, with 28,600 new immigrants, mostly Jewish, in 2016. The Israeli economy has undergone a dramatic transformation in the last 25 years, led by cutting-edge, high-tech sectors. Offshore gas discoveries in the Mediterranean, most notably in the Tamar and Leviathan gas fields, place Israel at the center of a potential regional natural gas market. However, longer-term structural issues such as low labor force participation among minority populations, low workforce productivity, high costs for housing and consumer staples, and a lack of competition, remain a concern for many Israelis and an important consideration for Israeli politicians. Prime Minister Benjamin NETANYAHU has led the Israeli Government since 2009; he formed a center-right coalition following the 2015 elections. In December 2018 the Knesset voted to dissolve itself, leading to an election in April 2019. When that election failed to result in formation of a government, Israel held a second election in September 2019, which also failed to result in the formation of a government. On 11 December 2019, the Knesset voted to hold a third election on 2 March 2020.