According to Ecobank Tanzania direct applicable exchange rates for foreign currency transactions to the public, on Monday 7th March, 2016 USD buying rate was TZS 2,126, while selling rate was TZS 2,252.
A week earlier, on Monday 29th February, 2016, buying and selling rates where TZS 2,127 and 2,253 respectively, representing an appreciation of just 1 Tanzanian Shilling per US Dollar.
See below for Ecobank full list of applicable exchange rates for US Dollar, Sterling Pound, Euro, Kenyan Shilling, South African Rand, Japanese Yen and Chinese Yuan Renminbi (CNY).