A bottled up Gem

This week while going thru mom's things I found lots of photo albums, some china plates and collectibles.  My favorite item found though are these bottles.  Growing up these bottles were proudly displayed in our kitchen on a shelf over the kitchen table. I remember being a child and really wanting to open one and see what it tasted like.  Today, thirty some years later, I am not so anxious!  One bottle commemorates the opening of the Tacoma Dome in 1983, the middle one commemorates the 1984 Olympic Games.  The Diet Pepsi bottle doesn't have a date on it.  What year do you think it's from?