user: Question: How many different imports from Mercosur had a % of 18.0?
Columns: ['Country', 'Population in 2011 (In thousands)', 'GDP (nominal) in 2011 ( USD millions)', 'GDP (nominal) per capita', 'GDP (PPP) in 2011 ( USD millions)', 'GDP (PPP) per capita', 'Merchandise exports ($ billions), 2011', 'Merchandise imports ($ billions), 2011', 'Exports to Mercosur (% of each, 2010)', 'Imports from Mercosur (% of each, 2010)']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Argentina', 40900.0, 447644.0, 10945.0, 716419.0, 17516.0, '84.3', '73.9', '25.2', '33.6']
SQL:

assistant: SELECT COUNT("GDP (nominal) per capita") FROM "Table" WHERE "Imports from Mercosur (% of each, 2010)" = '18.0';