One-half of one cent.
I don't know about you, but I would GLADLY kick that up to a dollar a year to support NASA. Maybe more.
One-Half of One Cent | Daylight Atheism | Big Think
How much money was spent for this daring and ambitious mission? The total cost of Curiosity is $2.5 billion, while NASA's overall budget is about $18 billion. This sounds like a lot, but actually it's about one-half of one percent of the entire federal budget. To put it another way, as I once heard Neil deGrasse Tyson do in a talk: for every dollar you pay in federal taxes, slightly more than half a penny goes to NASA.
And this half a penny from each of us has brought an incredible wealth of knowledge about our solar system, the origins of our world and our place in the universe. It's brought us not just Curiosity and the other Mars missions, but a whole fleet of spacecraft flying out from the Earth like seeds from a puffball: the New Horizons spacecraft on its way to Pluto, the Juno probe traveling to Jupiter, the MESSENGER craft orbiting Mercury, Cassini in orbit around Saturn, Dawn exploring the asteroids, and even the Voyagers, which are still transmitting data from the edge of the solar system. All this and much more was ours for one-half of one cent.