Timeline of the men's 100m world record which was broken by Jamaica's Usain Bolt on his way to winning the Olympic gold medal here on Saturday:

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9.92: Carl Lewis (USA)         24/09/88 at Seoul
9.90: Leroy Burrell (USA)      14/06/91 at New York
9.86: Carl Lewis (USA)         25/08/91 at Tokyo
9.85: Leroy Burrell (USA)      06/07/94 at Lausanne
9.84: Donovan Bailey (CAN)     27/07/96 at Atlanta
9.79: Maurice Greene (USA)     16/06/99 at Athens
9.77: Asafa Powell (JAM)       14/06/05 at Athens
9.74: Asafa Powell (JAM)       09/09/07 at Rieti
9.72: Usain Bolt (JAM)         31/05/08 at New York
9.69: Usain Bolt (JAM)         16/08/08 at Beijing.
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