With reference to agarwood production in India, consider the following statements:
- The North Eastern Region accounts for nearly 96.6% of India's agarwood trees.
- Assam has the largest number of agarwood trees in India.
- Agarwood is primarily obtained from species of the Aquilaria genus.
- Agarwood is mainly used in the manufacture of steel and construction materials.
Which of the statements given above are correct?