I found it interesting to see what other people were carrying, as well as fun to share my own stuff. I didn't get every year, but you can get the idea.
What's even more interesting to me is to see how my things have changed over the years - and how many stay the same. My goal is to start reducing and simplifying my life - to need less and carry less.
2007:
2009:
2011:
2013:
2014: