Agriculture and other primary industries play a large role in Hokkaido's economy. Hokkaido has nearly one fourth of Japan's total arable land. It ranks first in the nation in the production of a host of agricultural products, including wheat, soybeans, potatoes, sugar beets, onions, pumpkins, corn, raw milk, and beef. Hokkaido also accounts for 22% of Japan's forests with a sizable timber industry. The prefecture is first in the nation in production of marine products and aquaculture. The average farm size in Hokkaido is 26 hectares per farmer in 2013, which is almost 11 times bigger than the national average of 2.4 hectares.