Did a bit a way back, but now: zero. Might do the odd LE with members of CAP and GPWA I know, but only if it’s a relevant/quality link for my visitors. Otherwise its too much hassle, too many people trying to give you nothing back, too much energy spent checking they are still up etc.
Plus I feel that Links will continue to be down-graded as the SE’s get better. It’s a very poor concept as far as search engine ranking factors go – too easily gamed plus these days, of very little relevance to whether a site is actually any good or not. Google et al know this – their algos just aren’t good enough to totally discount linking. Yet.
If anything, it’s going to be more important who you link to (if it isn’t already). I add links to quality sites without asking for a recip and have seen evidence of improved rankings. Every now and then I link to someone here if their site is a) quality, b) relevant to my target audience and c) ranking pretty well (IE: deemed a good resource by the SE’s). On the basis that if it’s useful to my visitors, it’s useful for people in general and that’s what the SE’s want at the end of the day – the best possible information for people when searching.
Leaving aside the cynical view that they are more interested in PPC revenues of course 
The final straw for me was when I found out recently a long-time CAP member here had nofollowed all his/her link exchanges with other CAP members, mine included, for God knows how long. What’s the point when you have to deal with this and keep checking up on people?