Israeli companies or industries in the construction and agriculture sectors. The remaining 20% engaged in trade and commerce, marketing across the Green Line. According to a field survey taken by the Applied Research Institute-Jerusalem (ARIJ), 45% of Qalqilya's working population was employed by government, 25% worked in agriculture, 15% worked in trade and commerce, 10% worked in industry and 5% worked in Israeli labor. In 2012, the unemployment rate was 22%, with those most affected formerly employed in agriculture, trade and services. Qalqilya is particularly known for its citrus crop and of its total of 10,252 dunams of land, (of which 5,930 are arable) 1802 dunams (about 17.6% of the city's land and over 30% of its arable land) are planted with citrus trees. Other major crops are olives and vegetables. Local industries include the manufacture of foodstuffs, olive oil, dairy products, soap, glass, stone, marble and building materials, in addition to the manufacture of wood, and mineral water companies. The Qalqilya Zoo, established in 1986, is currently the only zoo in the West Bank and in the State of Palestine, and, according to its owner, is the city's single-largest employer. It serves as one of Qalqilya's main attractions. The zoo houses 170 animals and works closely with zoologists from the Jerusalem Biblical Zoo and the Ramat Gan Safari.The only factory for prosthetic limbs in the northern West Bank is in Qalqilya. Souqs In Qalqilya there are many markets, including: Souq Abu Amsha (سوق أبو عمشة) Souq Shaheen (سوق شاهين) Souq Abu Jaber (سوق أبو جابر) Souq Beshara (سوق بشارة) Souq Uthman (سوق عثمان) Souq Shawer (سوق شاور) Souq Al-Aqsa (سوق الأقصى) Land usage and the barrier Of the city's total area of 10,252 dunams, 3,027 were built-up areas, 266 were used for industrial purposes, 2,894 were planted with permanent crops, 419 were used for greenhouses, 274 for livestock ranges, 2,343 others were classified as arable, and 283 dunams were occupied by the West Bank barrier. Nearly all of Qalqilya's urban area is under Palestinian civil jurisdiction and Israeli military control (Area B), while 64.7% of the city's municipal territory, mostly agricultural lands and open spaces, is under Israeli civil and military control (Area C). Israel's construction of the barrier began in 2002 and isolates Qalqilya from the north, west, south, and half of its eastern side, leaving a corridor in the east connecting it with smaller Palestinian villages and