Google translate is giving me a challenge here, so I hope I understood you correct.
What you want to do is calculate the difference between the columns that contain the 2004 and the 2003 information?
Assuminging 2003 is column 2 and 2004 is column 3, try this:
= column(3) - column(2)
I think to understand that you also want to have the percentage of growth. If so, try this:
= column(3) / column(2)
If I translated this wrong, please give me an example with some data so I can easier understand you.