user: Question: What is the average number of wins of drivers from Sweden?
Columns: ['Rank', 'Nation', 'National Wins', 'Drivers', 'Driver Wins']
Types: ['real', 'text', 'real', 'text', 'real']
Sample row: [1.0, 'United Kingdom', 8.0, 'Dario Franchitti', 2007.0]
SQL:

assistant: SELECT AVG("Driver Wins") FROM "Table" WHERE "Nation" = 'Sweden';