I was born 20 years ago, but my brothers are born every year
Who Am I ?
Hint 1 :
Hint 2 :
I have my own needs.
Source: see here
Palau? The country that got its independence in 1994, 20 years before the original question. May be it's citizens are "brothers"? Not sure about how the hints match though.
You could be:
The Diamondbacks, the Arizona major league baseball team. First formed 20 years ago, the "brothers" the riddle is referring to could be the team each year, which changes.
Everyone on the team has different needs. The team itself has needs, namely to win and make money.
This fits the question as asked, although not the hints...
The first euro coin was minted 20 years ago in 1998. New coins are made every year.