user: ### NOW ANSWER:
Question: what is the crude birth rate (per 1000) when the natural change (per 1000) is more than 31.6 and the average population (x1000) is less than 1802?
Columns: ['Average population (x 1000)', 'Live births', 'Deaths', 'Natural change', 'Crude birth rate (per 1000)', 'Crude death rate (per 1000)', 'Natural change (per 1000)']
Types: ['real', 'real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1354.0, 43500.0, '11,500', 32000.0, 32.1, 8.5, 23.6]
SQL:

assistant: SELECT SUM("Crude birth rate (per 1000)") FROM "Table" WHERE "Natural change (per 1000)" > 31.6 AND "Average population (x 1000)" < 1802.0;