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Thats a lot of them. But i think so many people horde them that its not common to see them. I had a few from my Grandma once, they were stolen. Not because of them but they were in my wallet. Also 2007 was 10 years ago. Do not know how many are available now but 750 or so million of them seems like a lot. But i guess it is really not that many if you think about it.