I don't think we have touched the bottomest part of the ocean cause anything that goes down there just gets crushed by the pressure.
I think your right hundreds have been in space by now. The space station changed its crew loads of times and there are constant missions into space with people. Like russian , india ,america ,china are all active space countries now so the number will increase and now that virgin is doing space flights, the amount of people going to space is bound to up go alot more.