In this section we modeled the world population from 1900 to 2010 with the exponential function P(t) = (1.43653 ✕ 109) · (1.01395)^t, where t = 0 corresponds to the year 1900. According to this model, what was the rate of increase (in million/yr) of the world population in 1920? In 1957? In 2000? (Round your answers to two decimal places.)