The concept of securitization is generally associated with the Copenhagen school of security studies, which is generally taken to include Ole WÃ¦ver, Barry Buzan, and a range of other, more loosely associated, researchers.
Average annual number of employed coal miners in the United States, 1890-2014. US employment in coal mining peaked in 1923, when there were 863,000 coal miners. Since then, mechanization has greatly improved productivity in coal mining, so that employment has declined at the same time coal production increased. The average number of coal mining employees declined to 65,400 in 2015.
The mining industry in the US directly employs over 140,000 people, with annual salaries ranging from $30,000 to +$100,000 per year. The average miner makes $49,000/year.(MSHA 2001) In industries supporting the mining industry, another 160,000 people are employed in the US. Every American uses over 47,000 pounds of mined products each year. Mined minerals and materials made from those minerals account for over $33,000,000,000 each year.The USA is the 3d largest producer of gold, and second largest producer of copper in the world.he mining industry in the US directly employs over 140,000 people, with annual salaries ranging from $30,000 to +$100,000 per year. The average miner makes $49,000/year.