(sleepily pulls up calculator). OK, so that's about 324 dollars per person, worldwide. USA has a population of about 324 million, multiply the two and we get 105 billion* as the spend for the USA if we go by average spend per head. So the USA is actually under-spending on tech, per head of population, then?
(*that's anaemic 'financial billions', what the civilised world calls milliards, rather than proper 10^12 billions)