Analytics code in my blog: How to paste it??

Hi

I have a blog (using blogger) and I've added the Google Analytics code in it but the question is

Do I have to add a new Analytics code every time I make a new entry, every time a publish a new article?? Is it automatically inserted ?? Or isn't necesary??

Please any info would be helpful

 

If you have added it where suggested by them then only once is all that should be needed.

 

Thanks a lot !