Indonesia is one of the world's leading manufacturers of cardboard and corrugated paperboard. The country's vast forestry resources, including a large number of fast-growing tree species, provide a sustainable raw material supply for the industry. Indonesia's box production capacity is estimated at around 9 million tonnes per year. The majority of the country's production is exported, with the United States, Japan and China being the main markets. The Indonesian government is supportive of the box industry and has implemented a number of policies to promote its development. These include tax incentives for investment in new capacity, as well as subsidies for the purchase of raw materials. The box industry is an important contributor to the Indonesian economy, providing employment for around 200,000 people. It is also an important export earner, with exports valued at around US$1.5 billion in 2017.