SEOUL: Hyundai Motor Co reported Wednesday a 39 percent drop in its fourth-quarter income to the lowest level in seven years, hit by weak demand in South Korea and the United States and higher costs from strikes and sales incentives. The South Korean automaker said its October-December net profit was 1 trillion won ($859 million), compared with 1.6 trillion won a year earlier. The result missed forecasts. Analysts surveyed by FactSet, a financial data provider, expected 1.5 trillion won of net income. It was also lower than the previous quarter, when Hyundai recorded its smallest profit since the first quarter of 2010 after adopting international financial reporting standards. Sales fell 1 percent to 24.5 trillion won ($21 billion) while operating income declined 33 percent to 1 trillion won during the quarter. The company blamed a July-September strike that pushed up production costs and cost the company 95,400 vehicles worth of output. Lower car sales in South Korea also hurt. For the full year, Hyundai Motor's 2016 net income fell 12 percent to 5.7 trillion won. It sold 4.86 million vehicles last year, 2 percent lower than in 2015. Hyundai Motor's slowness to respond to the growing popularity of sports utility vehicles while demand for its mainstay sedans has declined has hit sales in its key markets. In South Korea, fourth-quarter car sales fell 6 percent over a year ago while in the United States, sales dropped 14 percent. Annual sales fell in South Korea as buyers flocked to imported Toyotas and Volkswagens instead of Hyundai's Sonata and Genesis sedans. Hyundai raised its incentives for car buyers and increased spending on marketing of its premium Genesis brand, increasing overall costs. The company said it plans to increase its production of sports utility vehicles, such as Santa Fe and Tucson, in the United States and China this year. Hyundai aims to sell 5.08 million cars in 2017, a 5 percent increase from 2016. The company predicted a tough business environment in the US car market this year and said interest rate hikes could hurt the auto finance market. Hyundai and its sister company Kia Motors Corp. are the world's fifth-largest automaker. They operate production lines in Georgia and Alabama. Before US President Donald Trump's inauguration, Hyundai announced the automotive group plans to invest $3.1 billion in the US for research and development and maintaining its factories in the next five years. 'We are closely monitoring the Trump administration's move to strengthen trade protectionism and a possible pressure on the countries that have a trade surplus with the United States,' Koo Zayong, Hyundai Motor's vice president, told investors. South Korea, Asia's fourth-largest economy, has a trade surplus with the United States.