Question: When was the minimum wage introduced in the country with the most tornadoes in the world?

full_context: Document 1: Tornado climatology: Tornadoes have been recorded on all continents except Antarctica and are most common in the middle latitudes where conditions are often favorable for convective storm development. The United States has the most tornadoes of any country, as well as the strongest and most violent tornadoes. A large portion of these tornadoes form in an area of the central United States popularly known as Tornado Alley. Other areas of the world that have frequent tornadoes include significant portions of Europe, South Africa, Philippines, Bangladesh, parts of Argentina, Uruguay, and southern and southeast Brazil, New Zealand, and far eastern Asia.
Document 2: Tornadoes in the United States: Nebraska is fifth overall for sheer numbers of tornadoes, while Indiana has had 88 violent tornado reports from the 1950 -- 2006 period, more than any state except Oklahoma. Iowa reported 3'900 almost as many as Texas. The deadliest tornado in US history, the Tri-State Tornado, struck Missouri, Illinois, and Indiana in March 1925. St. Louis, Missouri and neighboring East St. Louis, Illinois have been hit more than once by violent tornadoes, the most notorious of which was the St. Louis Tornado of May 1896. The New Richmond Tornado of May 1899 and the Flint, Michigan tornado of June 1953 also rank amongst the deadliest tornadoes in US history. The region was badly hit by the Palm Sunday Tornado Outbreak in April 1965 and by the Super Outbreak of April 1974. According to NCDC figures for the 1950 to 2006 period, Nebraska reported 2,440 tornadoes followed by Iowa (2,185), Illinois (2,086), Missouri (1,922), South Dakota (1,487), Minnesota (1,477), Indiana (1,327), North Dakota (1,216), Wisconsin (1,185), Michigan (981), and Ohio (916).
Document 3: Tornado climatology: The United States averaged 1,274 tornadoes per year in the last decade while Canada reports nearly 100 annually (largely in the southern regions). However, the UK has most tornadoes per area per year, 0.14 per 1000 km2, although these tornadoes are generally weak, and many other European countries have a similar number of tornadoes per area.
Document 4: Social security in Australia: In 1900, the states of New South Wales and Victoria enacted legislation introducing non-contributory pensions for those aged 65 and over. Queensland legislated a similar system in 1907 before the Australian labor Commonwealth government led by Andrew Fisher introduced a national aged pension under the Invalid and Old - Aged Pensions Act 1908. A national invalid diasbility pension was started in 1910, and a national maternity allowance was introduced in 1912.
Document 5: Tornado climatology: Tornadoes have been recorded on all continents except Antarctica and are most common in the middle latitudes where conditions are often favorable for convective storm development. The United States has the most tornadoes of any country, as well as the strongest and most violent tornadoes. A large portion of these tornadoes form in an area of the central United States popularly known as Tornado Alley. Other areas of the world that have frequent tornadoes include significant portions of Europe, South Africa, Philippines, Bangladesh, parts of Argentina, Uruguay, and southern and southeast Brazil, northern Mexico, New Zealand, and far eastern Asia.
Document 6: National Minimum Wage Act 1998: The National Minimum Wage Act 1998 creates a minimum wage across the United Kingdom, currently £7.50 per hour for workers aged over 25, £7.05 per hour for workers aged 21 to 24 and £5.60 per hour for workers aged 18 to 20.
Document 7: North Carolina: North Carolina averages fewer than 20 tornadoes per year, many of them produced by hurricanes or tropical storms along the coastal plain. Tornadoes from thunderstorms are a risk, especially in the eastern part of the state. The western Piedmont is often protected by the mountains, which tend to break up storms as they try to cross over; the storms will often re-form farther east. Also a weather phenomenon known as "cold air damming" often occurs in the northwestern part of the state, which can also weaken storms but can also lead to major ice events in winter.
Document 8: Tornadoes in the United States: Tornadoes are more common in United States than in any other country. The United States receives more than 1,200 tornadoes annually -- four times the amount seen in Europe. Violent tornadoes -- those rated EF4 or EF5 on the Enhanced Fujita Scale -- occur more often in the United States than in any other country.
Document 9: History of the minimum wage: After a study of the minimum wage laws in Australia and New Zealand The Liberal Party acted to set up a minimum wage in the most heavily sweated or underpaid industries, as part of a broad range of social reforms. Winston Churchill, president of the Board of Trade, introduced the Trade Boards Act in 1909. It created boards that set minimum wage criteria that were legally enforceable. The main provision was to set minimum wages in certain trades with the history of low wages, because of surplus of available workers, the presence of women workers, or the lack of skills. At first it applied to four industries: chain - making, ready - made dresses. paper - box making, and the machine - made lace and finishing trade. About 70 per cent of their 200,000 workers were women.
Document 10: National Minimum Wage Act 1998: The national minimum wage (NMW) took effect on 1 April 1999. On 1 April 2016 an amendment to the act attempted an obligatory ``National Living Wage ''for workers over 25, which was implemented at a significantly higher minimum wage rate of £7.20 (£7.50 from April 2017), and is expected to rise to at least £9 per hour by 2020.
Document 11: Minimum wage in the United States: In 1933, the Roosevelt administration made the first attempt at establishing a national minimum wage, when a $0.25 per hour standard was set as part of the National Industrial Recovery Act. However, in the 1935 court case Schechter Poultry Corp. v. United States (295 U.S. 495), the US Supreme Court declared the act unconstitutional, and the minimum wage was abolished. In 1938, the minimum wage was re-established pursuant to the Fair Labor Standards Act, once again at $0.25 per hour ($4.78 in 2017 dollars). In 1941, the Supreme Court upheld the Fair Labor Standards Act in United States v. Darby Lumber Co., holding that Congress had the power under the Commerce Clause to regulate employment conditions.
Document 12: Tornadoes in the United States: Most tornadoes in the United States occur east of the Rocky Mountains. The Great Plains, the Midwest, the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes. They are relatively rare west of the Rockies and are also less frequent in the northeastern states. Tornado Alley is a colloquial term for an area particularly prone to tornadoes. There is no officially defined 'Tornado Alley' -- at its broadest this area stretches from North Texas to Canada with its core centered on Oklahoma, Kansas and northern Texas. Another highly significant region -- colloquially known as Dixie Alley -- is the southern United States and particularly the northern and central parts of Alabama and Mississippi. Florida is one of the most tornado prone states. However, Florida tornadoes only rarely approach the strength of those that occur elsewhere.
Document 13: Unemployment benefits: The first unemployment benefit scheme was introduced in the United Kingdom with the National Insurance Act 1911 under the Liberal Party government of H.H. Asquith. The popular measures were to combat the increasing influence of the Labour Party among the country's working - class population. The Act gave the British working classes a contributory system of insurance against illness and unemployment. It only applied to wage earners, however, and their families and the unwaged had to rely on other sources of support, if any. Key figures in the implementation of the Act included Robert Laurie Morant, and William Braithwaite.
Document 14: Minimum wage in the United States: In 1910, in conjunction with advocacy work led by Florence Kelley of the National Consumer League, the Women's Trade Union League (WTLU) of Massachusetts under the leadership of Elizabeth Evans took up the cause of minimum wage legislation in Massachusetts. Over the next two years, a coalition of social reform groups and labor advocates in Boston pushed for minimum wage legislation in the state. In 1912, Massachusetts passed the first American minimum wage legislation, which established a state commission for recommending non-compulsory minimum wages for women and children. Within eight years, at least thirteen U.S. states and the District of Columbia would pass minimum wage laws, with pressure being placed on state legislatures by the National Consumers League in a coalition with other women's voluntary associations and organized labor. The United States Supreme Court of the Lochner era consistently invalidated compulsory minimum wage laws. Advocates for these minimum wage laws hoped that they would be upheld under the precedent of Muller v. Oregon, which upheld maximum working hours laws for women on the grounds that women required special protection that men did not. However, the Court did not extend this principle to minimum wage laws, considering the latter as interfering with the ability of employers to freely negotiate wage contracts with employees.
Document 15: Tornado climatology: The United States has the most tornadoes of any country. Many of these form in an area of the central (with some definitions including Southern) United States known as Tornado Alley. This area extends into Canada, particularly the Prairie Provinces and Ontario; however, activity in Canada is less frequent and intense than that of the US. The high frequency of tornadoes in North America is largely due to geography, as moisture from the Gulf of Mexico is easily advected into the midcontinent with few topographic barriers in the way. The Rocky Mountains block Pacific - sourced moisture and buckle the atmospheric flow, forcing drier air at mid-levels of the troposphere due to downsloping winds and causing cyclogenesis downstream to the east of the mountains. Downsloping winds off the Rockies force the formation of a dry line when the flow aloft is strong, while the Gulf of Mexico fuels abundant low - level moisture. This unique topography allows for frequent collisions of warm and cold air, the conditions that breed strong, long - lived storms throughout the year. This area extends into Canada, particularly Ontario and the Prairie Provinces, and strong tornadoes can also occur in northern Mexico.
ground_truth: 1909
sub_queries: who has the most tornadoes in the world Answer: the UK
when was the minimum wage introduced in the UK Answer: 1909