Dude, you know I love and respect you and all ... but you so better have remembered to purchase a gift of fine jewelry and a large floral offering.
Just because the "years between the 5s" don't appear on the Anniversary gift charts does not mean you don't have to get her anything.
I take it that Hallmark didn't write that card for you.
The Chicago Public Library
List of Anniversary Gifts says that the 16th is for "Silver Holloware".
I have no freaking clue what silver holloware is. (until I googled it.)
Congratulations to you and to Mrs. Blue!!