In 2000, China was operating three power reactors. As of 2014, it had 20 reactors on the grid, with another 28 under construction. An additional 50 reactors are planned to give a four-fold increase in nuclear capacity to at least 60 gigawatts of electricity by 2020, 200 GWe by 2030 and 400 GWe by 2050. To fuel its growing reactor population, annual requirements for uranium will jump from about 4,000 tonnes currently to 10-15,000 tonnes in 2020. China is responding by buying more uranium on the international market and investing heavily in overseas uranium properties.