In support of this effort, public funds earmarked for research and development were substantially increased from US$ 159.4 million in 1990 to US$ 500 million in 1999.
857. 为了支持这项努力，为研究和发展划拨的公共资金大为增加，1990年为1.594亿美元，1999年已经增加到5亿美元。