1969年，加拿大前首相皮尔逊建议，到1975年，发达国家应该将GDP的0.5%用于ODA，并将这一比例逐渐增加到1 % 。
In 1969, Canada’s former prime minister, Lester Pearson, recommended that developed countries should spend 0.7% of their GDP on ODA by 1975, and that they should eventually increase the proportion to 1%.