user: Question: When the standard stamp duty is 367 what is the percentage over gdp?
Columns: ['Year', 'Stamp duty reserve tax', 'Standard Stamp Duty', 'Standard Duties Total Revenue (in €million)', 'over Total Tax Revenue (in %)', 'over GDP (in %)']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['1995-96', 'n.a.', 'n/a', 1810.0, '0.59', '0.20']
SQL:

assistant: SELECT "over GDP (in %)" FROM "Table" WHERE "Standard Stamp Duty" = '367';