And as the graph below shows , Bolt 's season 's bests in the 200m are steadily getting slower rather than quicker .
Indeed , since the 2011 World Championships he 's only ever broken the 19.5 second mark once : in the 200m final at London 2012 .
As the graph below shows , Bolt 's season 's bests in the 200m are steadily getting slower rather than quicker .
Indeed , since the 2011 World Championships he 's only ever broken the 19.5 second mark once : in the 200m final at London 2012 .