Beijing's economy ranks among the most developed and prosperous in China. In 2013, the municipality's nominal gross domestic product (GDP) was CN¥1.95 trillion (US$314 billion). It was about 3.43% of the country's total output, and ranked 13th among province-level administrative units.Per capita GDP, at CN¥93,213 (US$15,051) in nominal terms and Int$21,948 at purchasing power parity, was 2.2 times the national average and ranked second among province-level administrative units. The city has a post-industrial economy that is dominated by the tertiary sector (services), which generated 76.9% of output, followed by the secondary sector (manufacturing, construction) at 22.2% and the primary sector (agriculture, mining) at 0.8%. The economy, which tripled in size from 2004 to 2012, grew at an annual rate of 7.7% in 2013. Owing to the concentration of state owned enterprises in the national capital, Beijing in 2013 had more Fortune Global 500 Company headquarters than any other city in the world. The city also ranked No. 4 in the number of billionaire residents after Moscow, New York and Hong Kong. In 2012, PricewaterhouseCoopers rated Beijing's overall economic influence as No. 1 in China.