user: ### NOW ANSWER:
Question: what is the crude birth rate (per 1000) when the crude death rate (per 1000) is less than 6.2, the average population (x1000) is larger than 2770 and the natural change (per 1000) is 17.2?
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 "Crude death rate (per 1000)" < 6.2 AND "Average population (x 1000)" > 2770.0 AND "Natural change (per 1000)" = 17.2;