 Complete the following phrase:  During his first tenure as president, the Russian economy grew for eight straight years, with GDP measured by purchasing power increasing by 72, real incomes increased by a factor of 2.5, real wages more than tripled; unemployment and poverty more than halved and the Russians self-assessed life satisfaction rose significantly. The growth was a result of a fivefold increase in the price of oil and gas, which constitute the majority of Russian exports, recovery from the 