According to estimates, global emissions of CO2 in the energy sector totaled 36 billion metric tons in 2020. The energy sector has been decarbonizing at a rate of 1% per year. Suppose that the energy sector continues to decarbonize at the historical rate of 1% per year. Estimate the number of years after 2020 that global annual emissions of CO2 from the energy sector are expected to drop below 14 billion metric tons. Round your answer to the nearest year