By 1925 the allowable weight had increased to 5 tonnes.

In 2000, its annual total capacity increased to 600,000 tonnes.

These changes increased the weight of the vehicle to 38 tonnes.

The government hopes to increase food production to 800,000 tonnes of cereals by 2020.

The weight of the vehicle has increased to 13.6 tonnes.

This increased to 7000 tonnes per day by 2006, a 6-fold increase from 1970.

Its capacity was projected to increase to 20,000 tonnes in the near future.

The overall weight was also increased to over 18 tonnes.

The production was increased to 300,000 tonnes a year.

By 2003, global production had increased to 4.38 million tonnes.