A site I’d like to note for later use is Swivel. Swivel is an innovative website dedicated to enabling people to share and analyze data. The site is pretty cool as of my first trial as it automatically generates graphs and allows you to update the data such as adding rows.
Here’s an automatically produced chart of the arrivals data from 2002-2007
From what I can tell, the site will aggregate the data in time so that comparisons are produced. This could prove a useful resource for collaboratively compiling data as well as providing a central place to consolidate data from various sources.