Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 4392719 was exactly right!
What do you guess are the next two digits of my number?
439271900
439271901
439271902
439271903
439271904
439271905
439271906
439271907
439271908
439271909
439271910
439271911
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439271918
439271919
439271920
439271921
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439271932
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439271998
439271999