The total mass of the pyramid is estimated at 5.9 million tonnes.

The report estimated the world trade in cereals for 1989/90 at 203,000,000 tonnes.

Recoverable oil in the field is estimated at 9.1 million tonnes.

Coal reserves in the east of the country are estimated at 17 billion tonnes.

Global production is estimated at 16,000 to 30,000 tonnes a year, with an annual growth rate of 10%.

The amount of various salts is estimated at 200 million tonnes.

The weight of the concrete bridge was estimated at 570 tonnes.

The total annual iron output is estimated at 82,500 tonnes.

Worldwide capacity is estimated at 100 thousand tonnes per year.

The global pulse market is estimated at 60 million tonnes.