[问答题]
b. Calculate the increa8f0s t;vkf 6rvse inc/km2qyp92 z u9uw 9jj the percentage of the worldwide population vaccinated betw/uy p9zjk92w m9uq2jc een 1980 and 1990
参考答案:
84-15 = 69%
(Note the numbers in the table are percentages, but the question only asks for the increase)