user: Question: Name the total number of county seat or courthouse for april 1 2010 denisty is 2205
Columns: ['Rank', 'County', 'State', 'Land area (km²)', 'Land area (mi²)', 'April 1, 2010 census', 'April 1, 2010 density (/km²)', 'April 1, 2010 density (/mi²)', 'July 1, 2010 official estimate', 'July 1, 2010 density (/km²)', 'July 1, 2010 density (/mi²)', 'July 1, 2011 official estimate', 'July 1, 2011 density (/km²)', 'July 1, 2011 density (/mi²)', 'Mid-2010 to mid-2011 change (Absolute)', 'Mid-2010 to mid-2011 change (%)', 'County seat or courthouse']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 'Los Angeles County', 'California', '10,509.87', '4,057.88', 9818605.0, 934.0, 2420.0, 9826773.0, 935.0, 2422.0, 9889056.0, 941.0, 2437.0, 62283.0, '0.63', 'Los Angeles']
SQL:

assistant: SELECT COUNT("County seat or courthouse") FROM "Table" WHERE "April 1, 2010 density (/mi²)" = 2205.0;