They're commonly referred to as alternative asset classes. Back in 2004, when we diversified our portfolio, we started to develop--and actually, we haven't been able to reap the benefits like many other big funds because we just started to develop them in 2004, and that's real estate, infrastructure, and private equity. When we benchmarked our 2004 diversification strategy, which included these investments, and we benchmarked them against our index portfolio, which was prior to 2004, we added $1.6 billion in added value as of last fiscal year.
As I mentioned before, I did a similar exercise and looked at the major peers, like teachers, OMERS, and Caisse. Each one of these asset classes for each one of these funds, and each asset class individually, outperformed the total overall fund, thereby outperforming public markets. These are asset classes that have performed very well. We've been developing them; we have benefited from them. I had done a pro forma exercise as well. Had we benefited from our targeted exposures, had we been able to have full target and been a mature fund, our performance would have been 1.5% higher on a four-year basis ending last year.
So clearly, these are assets that are only accessible if you are big, and as people know, infrastructure is getting a lot of profile these days. This is a good asset class. It's predictable cashflow. It's inversely correlated to the markets. Markets have been going down 30%, 40%. You'll see some people have already released results. Infrastructure returns are positive. So basically it has been our strategy since 2004, and I think I have given you a sense of the benefit of that.