Major industries include heavy engineering, armaments, iron and steel production, nonferrous metals, and chemicals. In 2000, industry accounted for 34% of Slovakia's GDP, and the industrial growth rate was estimated at 4% in 2001. Foreign firms such as Volkswagen, US Steel, and Whirlpool are major investors in Slovak industry. Although privatization was ongoing in 2002 (including the Slovak Gas Company and oil-pipeline operator Transpetrol), and the country was attracting more foreign investment, many firms untouched by foreign investment were in trouble. Nonetheless, many Slovakian enterprises were restructuring and modernizing their equipment and methods. Slovakia produced 182,003 automobiles in 2001, and 264 heavy trucks in 2000. The country had one oil refinery in 2002, with a capacity of 115,000 barrels per day.