PRAGUE (Reuters) -The Czech central bank raised its main interest rate by 75 basis points on Thursday to 5.75%, the highest point since 1999, as inflation soared on global price shocks combined with a tight domestic labour market. The hike was bigger than unanimous market expectation of 50 basis-point increase. The bank has been tightening policy since last June, raising borrowing costs by 550 basis points. Policymakers believe that the main repo rate may be near or at peak as inflation is expected to fall significantly next year, the horizon where the bank sees its current rate decisions havi…