user: Question: What year had a score of 0.586?
Columns: ['Index', 'Score', 'PALOP rank', 'CPLP rank', 'n Africa rank', 'World rank', 'Year']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Human Development Index', '0.586', '1 (top 17%)', '3 (top 38%)', '10 (top 19%)', '132 (top 65%)', 2012.0]
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Score" = '0.586';