[bastawhiz]

That data doesn't look to be adjusted for inflation, no? 1990 dollars are worth essentially half of today's dollars, so those charts don't say very much, even if they only go to 2005.

Edit: it's also the case that the population has grown by 50 million people since 1990, which would bring an expected increase of 15-20% in expenditure. Accounting for both, I'm surprised we don't spend more.

[granzymes]

I glanced at the links, and there are inflation-adjusted figures included. See for example bullet 5 in the first link.