The value of New Zealand's forestry product exports has more than doubled in the last 20 years.
Statistics New Zealand figures released on Monday show that $4.5 billion worth of products was exported in 2012 compared with $1.9 billion in 1992.
Statistics New Zealand prices manager Chris Pike says the rise was due mainly to the volume of log exports rising, especially to China.
Mr Pike says the types of forestry products exported and which countries bought them have also changed. In 1992, logs accounted for less than a quarter of New Zealand's total forestry exports and has jumped to 35% by 2012.
New Zealand is now the third-largest exporter of logs in the world after Russia and the United States.