user: Question: How many regions have 0.5% solar panels?
Columns: ['Region', 'Public network', 'Own/community generator', 'Solar panel', 'Other source', 'None']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Arica and Parinacota', '98.2%', '0.8%', '0.1%', '0.5%', '0.5%']
SQL:

assistant: SELECT COUNT("Public network") FROM "Table" WHERE "Solar panel" = '0.5%';