Robert Biesterfeld
Analyst
I don't think it's too different to compare. And I think it's a great question, Bruce, and I'm really glad that you asked it. I'd point first to the retention rate of our top 500 customers over the past decade, and the fact that we have got nearly 100% retention rate of those customers. So I do believe that us continuing to take the long-term view to these relationships makes a lot of sense.
With that being said, I can tell you that we did learn a lot since the last freight cycle, and our learnings from that have really helped us to inform both the decisions that we're making and the actions that we're taking today. Albeit sometimes the results of those are painful in the short-term, we really do believe that the steps we're taking will enhance our results through the cycles.
Look, the annual procurement cycle is not a perfect science for either the shipper or the carrier, but it still does dominate the common practice in terms of how freight contracts are managed. Part of our learnings from that last freight cycle have come to life in the launch of our Procure IQ product, which is tied into this rising freight environment, we don't think that we're necessarily going to change how all of freight is procured, but we do think that we can introduce really interesting conversations with some of our really big clients and provide an alternate approach to them to approach this market that could work more effectively for all the parties in the supply and the demand side of the equation.
Up to this point, we've pushed about $1 billion of opportunity through that process already, and we're seeing some really nice win-win returns for both us and our shippers. So we're taking those learnings to become more innovative, to be more consultative in our approach for our customers and to help them navigate, which appears to be shaping up to be a difficult environment in new ways.
Specific to your question, though, one of the learnings that we did take away from the freight cycle of '17 and '18 was that in the cases where we managed to our commitments and honored them through what, let's call it, the Snowmageddon and the ELD implementation phases, which were kind of the catalyst of that cycle, we continue to see great returns with those customers and really, really strong relationships.
On the flip side of that, though, we did learn that, perhaps, we overreacted a little bit too quickly in those cycles to short-term market dynamics back in 2017. We did cause some damage to some relationships. And in many cases, we haven't been able to regain either the trust or the volume commitment of some of those customers. So we're intentionally being more patient through this cycle and putting even more value on the importance of those long-term relationships and working with our customers to manage through this cycle together.