Disputes down 42% in 2012, but remains most valuable in the world.
Economic slowdown also affecting builders in the country.
Thousands had walked off work to protest wage demands.
Increases to be led by cement, steel, and plastic industries.
Three schemes have been funded for sustainable housing solutions.
Builders expect continued increases in building material prices.
Firm reports decline despite strong demand from Latin America.
Page 1 of 310