KENYA’S central bank said on Friday it was in the market to mop up 5 billion shillings ($59.8 million) through repurchase agreements, after liquidity surged due to debt redemptions and huge demand for Treasury bills.The weighted average interbank rate fell to 16.6 percent on Thursday, from 16.8 percent a day earlier, and traders said they expected the central bank to defend the shilling by mopping up excess liquidity.