KARACHI (Reuters) - The Pakistani rupee weakened 0.50 per cent against the dollar on Wednesday because of pressure from import payments, and dealers said they expect the currency to remain under pressure. The rupee ended at 85.08/15 to the dollar, compared with Tuesdays close of 84.67/73. There are big import payments in the market which is causing the rupee to weaken, said a currency dealer. Dealers said the rupee traded at 85.14 to the dollar, compared with its all-time record low of 85.15 in February. The rupee has lost 0.92 percent against the dollar this year after losing 6.17 percent last year and a 22.12 percent slide in 2008.