user: Question: How many of the elected officials are on the Economic Matters committee?
Columns: ['District', 'Counties Represented', 'Delegate', 'Party', 'First Elected', 'Committee']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['09.1 9A', 'Howard', 'Bates, Gail H. Gail H. Bates', 'Republican', 2002.0, 'Appropriations']
SQL:

assistant: SELECT COUNT("First Elected") FROM "Table" WHERE "Committee" = 'Economic Matters';