Use of で when describing survey results (or answers)


Could someone please explain the use of で (in bold) below? The line is taken
from the article: [男の子の将来の夢は「学者」
女の子は「食べ物屋さん」](http://www3.nhk.or.jp/news/easy/k10011279391000/k10011279391000.html)
and describes the results of a survey.

> 女の子で１番多かったのは、２１年続けて「食べ物屋さん」 **で** 、１１．３％でした。２番目は「看護師さん」 **で**
> ９．５％、３番目は「保育園や幼稚園の先生」 **で** ６．９％でした。

I'm confident about what is meant (since context makes it so clear) but if I
were to have constructed it myself, I never would have used で. I'd have
probably done something like:  
「食べ物屋さん」と答えた子が１１．３％でした  
which could easily be unintelligible gibberish and would appreciate a
correction is needed.

Also, I'm having a hard time finding exactly what a 食べ物屋さん is. Is this a
person who prepares food at a restaurant, is it a waitress, is it just a
generic term for anyone who works at a restaurant, or is it something else
entirely?




In response to your comment, Aで、Bでした" doesn't mean A is B. I'm assuming this
is sentence is describing a survey.

>
> 女の子で１番多かったのは、２１年続けて「食べ物屋さん」で、１１．３％でした。２番目は「看護師さん」で９．５％、３番目は「保育園や幼稚園の先生」で６．９％でした。
>
> "Among girls the most frequent (answer/finding), for 21 years in a row,
> **was** _waitress_ **and** was 11.3% (of the total). The second (most
> frequent) **was** nurse **and** was 9.5%...

So で simply means "...is X and..." or "...was X and..." just like it normally
does.

By the way, I'm not sure about my translation of 食べ物屋さん. Please correct me if
I got it wrong.




In response to your comment, Aで、Bでした" doesn't mean A is B. I'm assuming this
is sentence is describing a survey.

>
> 女の子で１番多かったのは、２１年続けて「食べ物屋さん」で、１１．３％でした。２番目は「看護師さん」で９．５％、３番目は「保育園や幼稚園の先生」で６．９％でした。
>
> "Among girls the most frequent (answer/finding), for 21 years in a row,
> **was** _waitress_ **and** was 11.3% (of the total). The second (most
> frequent) **was** nurse **and** was 9.5%...

So で simply means "...is X and..." or "...was X and..." just like it normally
does.

By the way, I'm not sure about my translation of 食べ物屋さん. Please correct me if
I got it wrong.

