Total non-commercial movements is down from 1,171,000 in 1986 to 694,000 in 2013. I suppose this doesn't give the whole picture but it doesn't paint a pretty picture!
As very few GA airfields report movements the reality is probably far worse that these stats show.
From other CAA stats you can see that the number of PPLs issued last year was approximately half the number issued in 1995 let alone 1985.
GA has been desimated over the last 30 years and whilst econimics is responmsible for some, the European adventure has taken care of the rest and has not finished yet! If they have their way actrivity will halve again in another 3 years!