44307
What is the meaning and the grammar behind ばだった?

Here is the sentence I've found it in:

> このほか、経済的な理由で、キャンプや海水浴などを体験させることができないと答えた保護者の割合が、「困窮層」では２０％台後半から４０％台半
> **ばだった** のに対し、「一般層」は１％未満と大きな開きが見られました。
CC BY-SA 3.0
2017-03-11T12:37:37.750
44305
2017-03-11T15:38:15.147
19511
question
grammar
What does ばだった stand for?
40%台半ば + だった。 It was about 45%.
CC BY-SA 3.0
2017-03-11T14:18:50.023
44307
2017-03-11T14:18:50.023
20111
44305
answer
A large disparity was observed: as against the fact that the proportion of
carers in the "impoverished" category who answered that for economic reasons
they were unable to give [the children in their care] the experience of
camping or sea-bathing was from the upper 20% range to the mid-40%
[40%半ば]range, the proportion in the "average" category was less than 1%. That
is, of the categories studied, 25% to 45% of those classified as "poor" said
they couldn't afford to send the kids in their charge to camp or take them to
the seaside, while less than 1% of those classed as "average" or "ordinary"
said this.  
40%なかば = "mid-forty-per-cents"
CC BY-SA 3.0
2017-03-11T15:38:15.147
44310
2017-03-11T15:38:15.147
20069
44305
answer