user: Question: How many numbers were recorded under 2001 when 2006 was 18.9?
Columns: ['Ethnic Group', '2001 (%)', '2001 (people)', '2006 (%)', '2006 (people)']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['New Zealand European', '66.9', '684,237', '56.5', 698622.0]
SQL:

assistant: SELECT COUNT("2001 (%)") FROM "Table" WHERE "2006 (%)" = '18.9';