Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 683040115 was exactly right!
What do you guess are the next two digits of my number?
68304011500
68304011501
68304011502
68304011503
68304011504
68304011505
68304011506
68304011507
68304011508
68304011509
68304011510
68304011511
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68304011516
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68304011531
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68304011540
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68304011599