Spouse but no sex:/

I've never posted here but wanted to see if my experience is unique because part of the conversation with my spouse is always that he is "perfectly normal" and I have no way to compare  other than by my first marriage, which I try not to do. 
It is August. We have had sex once so far this year (January). I know that because I use this app!! I have tired buying lingerie, initiating, and talking about my needs/what he needs, but it has equalled a waste of money, hurt from being constantly rejected, and no real resolution. 
The last time we talked about our sex life (at my insistence and to his obvious discomfort) he said sex was "just too much work" and that it is "completely normal for men to want sex less as they get older". 
I don't disagree out of hand but ONCE SINCE JANUARY??!! I could happily have sex once a day. We are in our 30's and have no kids, we do work shift and have had some stress in our relationship but I don't think this is "normal". We have been together for 8 years now and every year this issue gets worse, in the beginning I didn't really keep track of things but had no issues until about five years ago. 
All constructive feedback, opinions, thoughts, similar experiences and suggestions are appreciated!
Thank-you:)