Use of など after a counter


I was reading
[this](https://www3.nhk.or.jp/news/easy/k10012473731000/k10012473731000.html)
and came across a use of など where I wasn't confident in my interpretation:

> アメリカから来た人が５０人、中国とインドが３０人、韓国とフランスが２０人 **など** でした。

My interpretation of this sentence is "50 people came (to Japan) from America,
30 people came from China and India (each), and 20 people came from Korea and
France (each)." Reading the sentence gives me the sense that this list isn't
exhaustive, so people from other countries than those listed also came to
Japan.

However, I have really only seen など used after nouns in a list, or sometimes
just after one noun that is a part of an unwritten list. I can see a list
being :

> アメリカから来た人と、中国から来た人と、インドから来た人と、韓国から来た人と、フランスから来た人 **など** でした。

and then obviously wanting to get rid of the repetitive から来た人 phrase, and then
adding the people counter to specify the number per country.

In this sentence would the "phrase" 中国とインドが３０人 be considered the "noun" in the
list or is it more the just phrase アメリカから来た人 that are being listed?

Additionally, does it give any sense that the numbers are approximate values?
It seems unlikely that a multiple of 10 people came from each of the countries
listed.

Finally, would changing the copula to ありました be an acceptable substitution when
using など like this?




If it's actually supposed to continue like "インドネシアが１０人、オーストラリアが…", you can
substitute など for that part.

> In this sentence would the "phrase" 中国とインドが３０人 be considered the "noun" in
> the list or is it more the just phrase アメリカから来た人 that are being listed?

The former interpretation seems reasonable to me, in other words, 中国とインド is a
metonym for those who came from the indicated places, like ぼくがウナギだ as in an
order in a restaurant or こんにゃくは太らない、砂糖が太る as in diet.

Anyway, ３０人 is an adverb as a predicate like 走りが ゆっくりだ as opposed to ゆっくり走る.

> would changing the copula to ありました be an acceptable substitution when using
> など like this?

No, that doesn't work regardless of など because you don't really apply ある to 人.
However, いる would be fine, and in that case, ３０人 would be a typical adverb
like ゆっくり走る as opposed 走りがゆっくりだ.

