Terrible Conversion Rates For Amazon

I've been using amazon affiliate network for a long time. However, in the past 12 months I've seen a steady decline in click through ratio, and conversions. My best year was 2013, $12K in sales, then 2014 a sharp decline, and today, nothing. We're talking not even any click throughs, well, not specifics anyways.

Anyone else seeing a steady decrease in engagement? I'm baffled by the spikes to the bottom

Poster :