user: Question: When were the odds of winner 16.66?
Columns: ['Year', 'Horse', 'Driver', 'Trainer', 'Country of owner', 'Odds of winner', 'Winning time (km rate)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2009.0, 'Triton Sund', 'Örjan Kihlström', 'Stefan Hultman', 'Sweden', '4.77', '1:11.1']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Odds of winner" = '16.66';