By July 2019, the seasonally adjusted unemployment rate had increased to 7.0%, which represented an increase of 0.3% from the previous year. The unemployment rate in Alberta peaked in November 2016 at 9.1%. Its lowest point in a ten-year period from July 2009 to July 2019 was in September 2013 at 4.3%. By August 2019, the employment number in Alberta was 2,344,000, following the loss of 14,000 full-time jobs in July, which represented that the "largest decline" in Canada according to Statistics Canada. Employment by industry, Alberta – seasonally adjusted (000s) Extraction industries According to the Government of Alberta, the "mining and oil and gas extraction industry accounted for 6.1% of total employment in Alberta in 2017". By April 2019, there were about 145,100 people working directly with the oil and gas industry. In 2013, there were 171,200 people employed in the mining and oil and gas extraction industry. In 2007 there were 146,900 people working in the mining and oil and gas extraction industry. Oil and Gas Extraction industry = 69,900 Support Activities for Mining & Oil & Gas Extraction (primarily oil and gas exploration and drilling) = 71,700 Mining other than oil and gas (mainly coal and mineral mining & quarrying) = 5,100 Largest employers of Alberta According to Alberta Venture magazine's list of the 50 largest employers in the province, the largest employers are: Sectors Oil and gas extraction industries In 2018, Alberta's energy sector contributed over $71.5 billion to Canada's nominal gross domestic product. In 2006, it accounted for 29.1% of Alberta's GDP; by 2012 it was 23.3%; in 2013, it was 24.6%, and in 2016 it was 27.9%. According to Statistics Canada, in May 2018, the oil and gas extraction industry reached its highest proportion of Canada's national GDP since 1985, exceeding 7% and "surpass[ing] banking and insurance". with extraction of non-conventional oil from the oilsands reaching an "impressive", all-time high in May 2018. With conventional oil extraction "climbed up to the highs from 2007", the demand for Canadian oil was strong in May. Alberta is the largest producer of conventional crude oil, synthetic crude, natural gas and gas products in the country. Alberta is the world's 2nd largest exporter of natural gas and the 4th largest producer. Two of the largest producers of petrochemicals in North America are located in central and north central Alberta. In both Red Deer and Edmonton, world class polyethylene