I'm trying to add numbers row by row but I can't figure out how to do it.

example: 

__DATA__
1   2005-01-16
6   2005-01-28
1   2005-01-31
2   2005-02-01
2   2005-02-02
1   2005-02-05

[download]

I'd like to have an output like this: 

1    2005-01-16
7    2005-01-28
8    2005-01-31
10   2005-02-01
12   2005-02-02
13   2005-02-05

[download]

any tipps?

One of Crete's own prophets has said it: 'Cretans are always liars, evil brutes, lazy gluttons'.
He has surely told the truth.

In reply to Add numbers row by row by epimenidecretese

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