Case #3 The Growth Rate of the World's Population Hannah, an industrial relations major, is writing a term paper and needs an estimate on how fast the world population is growing. In her almanac, she finds that the worlds' population was an estimated 7.1 billion people at the end of 2014. The United Nations estimates that the population will reach 9 billion people at the end of 2054. What will be the world's population at the end of 2019, if you use the annual growth rate implied by United Nations' numbers