take time into account

[Edwige BOUH]

Hi 

I have a file with 4 years datas. Theses datas are specific for each year. What i want to do is to make and open a file that contain data for all years and be able to do modification on a specific year and save it. The file will be open for a specific year . 

Can you help me ? 

Thanks 

--
Edwige BOUH