Scientific research and development remains important in British universities, with many establishing science parks to facilitate production and co-operation with industry. Between 2004 and 2008 the UK produced 7 per cent of the world's scientific research papers and had an 8 per cent share of scientific citations, the third and second-highest in the world (after the United States and China, respectively). Scientific journals produced in the UK include ''Nature'', the ''British Medical Journal'' and ''The Lancet''. The United Kingdom was ranked 4th in the Global Innovation Index 2020, up from 5th in 2019.