Ive tried posting the picture of the log a couple times but I keep getting error 200 something. There wasn't any code like that although there was a stenciled area for it on the side of the can, it may have been washed off. I didn't get a picture of the most recent visit as someone had put it on a random page but best as I can tell here is the rest.
1/20/17 BS or B5
1/12/16 YRWELOST or YRWELO5T
11/25/16 Mardub51
11/22/16 KNSLVR ?????
11/2/16 MAK50
9/11/16 NAG
3/7/16 chrisbritt and Caver-bill
2/18/16 MRC, Inky + Jason
09/27/15 Noah
1/23/15 1CUZ and BEACHLVR31
1/18/15 Teachbs65