Don't they have a parachute system for small plane's now? After market
deal where if in trouble you pop the chute and land the plane.

Yes - it comes standard with the Cirrus SR22 (http://brsparachutes.com/)
and is available as an after market kit for some aircraft. From what I've
read there are a few examples where it's saved the occupants - but also a
few where they've deployed the chute but occupants have still died - in that
respect, similar to ejection seats.

Does anyone know if "percentage surviveability" is increasing with modern
ejection seats? and what figures we're currently at?

CC