The prize is awarded annually in Stockholm on December 10, the anniversary of Nobel's death. As of the granting of the 2020 prize, 52 economic sciences prizes had been awarded to 86 persons. They are given out by the Bank of Sweden Award Committee for the Nobel Foundation. The number of winners has increased over time: when Nobel first started giving awards in 1968 there were only two prizes, one for physics and one for chemistry. Since then five more prizes have been added, three for literature and two for medicine/physiology or discovery. There was no prize for peace until 2009 when economist Barack Obama became the first president to receive the award. Out of the 52 prizes that have been given since 1968, 23 have been given posthumously. Ten of these prizes were given for work done after Nobel's death in 1945: the first was given in 1950 to Karl von Wieser for his work on price theory; the second was not given until 2004; the last one was given in 2008 to Robert Aumann and John Nash for their work on game theory. The other 13 prizes were given for work done before Nobel died in 1945: the first one was given in 1969 to Herbert Simon for his work on organizational behavior; the others were given at various times between 1970 and 1996 for works related to computer science, mathematics, statistics, economics, and philosophy.