Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE invoices (billing_state VARCHAR, billing_country VARCHAR)
### Question:
List the number of invoices from the US, grouped by state.
### Answer:
SELECT billing_state, COUNT(*) FROM invoices WHERE billing_country = "USA" GROUP BY billing_state