It has been estimated that 5,000 cubic meters of marble could be extracted annually over a period of twenty years.

The cane is grown for two years and when harvested the sugar is extracted over a period of 2 to 3 days.

All the rubies were extracted from a single mine in Burma, over a period of twenty years.

Data can also be extracted over time (including statistical information such as minimum, maximum and standard deviation).

From tunnels and cellars my troops extracted over two tons of weapons and ammunition.

Both chalk and a small amount of clay have been extracted over the years, Meanwhile in more recent times flint was dug out for road making.

At times I have extracted over two cups of pure fat when roasting a single Long Island duck.

The company extracted over fourteen million short tons of coal from those three mines in 2007.

Both chalk and a small amount of clay have been extracted over the years.

At current prices, Scotgold believes there could be around £170m of the precious metals in the site, which could be extracted over the 10-year project.