user: Question: what is the unemployment rate where the market income per capita is $16,406?
Columns: ['County', 'Population', 'Unemployment Rate', 'Market Income Per Capita', 'Poverty Rate', 'Status']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Barbour', 15557.0, '5.1%', '$15,596', '22.6%', 'Distressed']
SQL:

assistant: SELECT "Unemployment Rate" FROM "Table" WHERE "Market Income Per Capita" = '$16,406';