institutions. The 2004 Financial Sector Reform Master Plan provides tax breaks to financial institutions engaging in mergers and acquisitions. The reform program has been deemed successful by outside experts. In 2007 there were three state-owned commercial banks, five state-owned specialized banks, fifteen Thai commercial banks, and seventeen foreign banks in Thailand. The Bank of Thailand sought to stem the flow of foreign funds into the country in December 2006, leading to the largest one-day drop in stock prices on the Stock Exchange of Thailand since the 1997 Asian financial crisis. The sell-off by foreign investors amounted to more than US$708 million. In 2019, the Bank of Thailand kept its benchmark interest rate unchanged for a fourth straight meeting, with the concerns of high household debt and financial stability risks. Retail Retail employs more than six million Thai workers. Most are employed by small businesses. Large multinational and national retail players (such as Tesco Lotus, 7-Eleven, Siam Makro, Big C, Villa Market, Central Group and Mall Group) are estimated to employ fewer than 400,000 workers. This accounts for less than seven percent of Thailand's total employment in retail. Tourism In 2016, tourism revenue, 2.53 trillion baht, accounted for 17.7 percent of Thailand's GDP, up from 16.7 percent in 2015. It is expected to generate 2.71 trillion baht in 2017. The global average for GDP contribution from tourism is nine percent. Cryptocurrencies Thailand's Ministry of Finance approved four licensed brokers and dealers of cryptocurrencies in the country: Bx, Bitkub, Coins and Satang Pro. The country still did not elaborated regulation for ICOs, though it announced in late 2018 to loosen the rules. Labour Thailand's labour force has been estimated at from 36.8 million employed (of 55.6 million adults of working age) to 38.3 million (1Q2016). About 49 percent were employed in agriculture, 37 percent in the service sector and 14 percent in industry. In 2005 women constituted 48 percent of the labour force, and held an increased share of professional jobs. Thailand's unemployment rate was 0.9 percent as of 2014, down from two percent in 2004. A World Bank survey showed that 83.5 percent of the Thai workforce is unskilled. A joint study by the Quality Learning Foundation (QLF), Dhurakij Pundit University (DPU), and the World Bank suggests that 12 million Thais may lose their jobs to automation over the next 20 years, wiping out one-third of the positions in the workforce.