user: Question: Which year did USA undergo a disaster?
Columns: ['Disaster', 'Year', 'Countries Affected', 'Scale of Disaster', 'People Assisted', 'Nature of Help']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Kosovo', '1997', 'Kosovo, Albania, Serbia', '10k killed, 850k displaced', '> 10,000', 'Medical, Food, Clothing']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Countries Affected" = 'USA';