Didn't Optimum Nutrition 100% whey once had aspartame?

[Symbot]

I've been taking Optimum Nutrition 100% Whey Gold standard for 6 years. I thought it had aspartame back then? I quit looking at the label. Now when I looked at it, it uses Acesulfame Potassium on the chocolate flavor. The cappuccino flavor has sucralose added.

I'm just curious, when did they stop using aspartame?