"However, the report warns American share of design-related revenues have begun to wane, dropping from more than 50 percent in 2015 to 46 percent in 2020.<p>If the US fails to make any public investments in the private chip design sector, SIA argues the country's share of design-related revenues could drop to 36 percent by the end of 2030.<p>While the US private sector invests in chip design R&D more than any other region, public investments by Uncle Sam currently amount to 13 percent of the country's total spending, according to the report. This puts the US behind mainland China, Europe, Taiwan, Japan, and South Korea, whose public investments average to about 30 percent, the report said."