In case you hadn't seen this, I think it's pretty interesting. It starts slow then goes month by month through 1998. Wish it were more current but it's still pretty intense. This is what America's #1 at.
EDIT: As an extra I thought I'd post a link to the document he got his statistics from:
http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/31/060/31060372.pdf
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