Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What year had a score of 0.586?

### Inputs:
table_name: table, columns: ['Index', 'Score', 'PALOP rank', 'CPLP rank', 'n Africa rank', 'World rank', 'Year']

### Response:
SELECT COUNT Year FROM table WHERE Score = 0.586