I have most of my Marriott Rewards and Honored Guest statemtnes. Why, I don't know, but I have them. On the back of my June 1997 statement is a reward chart.
Earlier statments do not have an award chart on the back. It is interesting that there were no hotel categories, except by brand. And, there were no Residence Inn, SpringHill Suites, TownPlace Suites, Renaissance, etc. hotels listed.
Thought this might be interesting to share. I started a discussion Marriott Rewards History and home some of you long-timers will add.