The TOP500 list highlights the most powerful supercomputers in the world. The number 1 system on the 39th TOP500 list is the Sequoia supercomputer at Lawrence Livermore National Laboratory in the US, with a performance of 16.3 petaflops (quadrillions of calculations per second). Overall, US systems make up 5 of the top 10 systems and have the highest total performance of over 61 teraflops (trillions of calculations per second). China has the second highest total performance and Europe is third. Since the first TOP500 list in 1993, there has been exponential growth in supercomputer performance and the number of systems has replaced every 1.5 years on average.