Recent developments in my 1337 coder skillz has allowed me to take statistics of ALL alliances and ALL nations instead of only the top 50 alliances and BK nations.
If all goes well, you'll be able to download them at 3:30 AM here http://bkpw.net/stats.html
On my to-do list is to allow you to select a time range to download stats from, though with the way everything is written it'll be fairly impossible. I may just export each day to a .txt and then you can download which days you want, though that'll be in the future. For now, you download EVERYTHING.