You have to shrink the base to get high percentage growth - a war that is devastating have the effects of reducing labor and increase the need of labor to rebui

You have to shrink the base to get high percentage growth - a war that is devastating have the effects of reducing labor and increase the need of labor to rebuild infrastructure so it gives a decade or two of rapid growth... Aside from that - nuclear fusion, space travel and colonization are the only technologies that could possibly give this kind of sustained growth.