user: ### NOW ANSWER:
Question: Name the number of population density 2010 for Duque de Caxias
Columns: ['Administrative division', 'Area (km²)', 'Population 2000 Census', 'Population (2010 Census)', 'Population density 2010 (/km²)']
Types: ['text', 'text', 'real', 'real', 'real']
Sample row: ['Belford Roxo', '79', 434474.0, 469261.0, 5940.0]
SQL:

assistant: SELECT COUNT("Population density 2010 (/km²)") FROM "Table" WHERE "Administrative division" = 'Duque de Caxias';