user: Question: What's the average total cargo in metric tonnes that has an 11.8% Change?
Columns: ['Rank', 'Airport', 'Code (IATA/ICAO)', 'Total Cargo (Metric Tonnes)', '% Change']
Types: ['real', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Memphis International Airport', 'MEM/KMEM', 3697054.0, '0.0%']
SQL:

assistant: SELECT AVG("Total Cargo (Metric Tonnes)") FROM "Table" WHERE "% Change" = '11.8%';