user: Question: How many provinces have a density of 165.81?
Columns: ['GB', 'ISO №', 'Province', 'Chinese Name', 'Capital', 'Population¹', 'Density²', 'Area³', 'Abbreviation/Symbol']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'real', 'text']
Sample row: ['BJ', 'CN-11', 'Beijing Municipality', '北京市 Běijīng Shì', 'Beijing', 19612368.0, '1,167.40', 16800.0, '京 Jīng']
SQL:

assistant: SELECT COUNT("ISO №") FROM "Table" WHERE "Density²" = '165.81';