Table:
text: List of Indianapolis 500 winners
Nationalities of foreign-born winners
Nationalities of foreign-born winners
Rank_ Nation National_Wins Drivers Driver_Wins
3 Italy 3 Mario Andretti [b] 1969
5 Netherlands 2 Arie Luyendyk 1990
6 Canada 1 Jacques Villeneuve 1995
6 Sweden 1 Kenny Bräck 1999
6 Colombia 1 Juan Pablo Montoya 2000
6 New Zealand 1 Scott Dixon 2008

Question: What is the average number of wins by drivers from Sweden among the nationalities of foreign-born Indianapolis 500 winners?