Economic growth in September 2011 was 8.3 percent.

The indicator measures the overall activity of Panama's economy in such sectors as services, manufacturing and utilities and is a rough proxy for quarterly gross domestic product data.

In August, the economy grew by 9.26 percent, much faster than the 6.8 percent originally reported last month. The office did not explain the reason for such a huge revision.

Growth in September continued to be led by gains in the construction and mining sectors, the result of significant government infrastructure projects.

The Central American country has seen double-digit economic growth over the past few years, expanding 10.5 percent in 2011 with similar expectations for 2012.

Much of the growth is due to heavy spending on public works, including the $5.25 billion expansion of the Panama Canal and the construction of a $1.25 billion metro system.

In September, the hotel, restaurant and slot machine industries also performed well due to a rise in tourism, as did the transportation sector, mainly because of the movement of containers through ports.

The agricultural sector showed some gains in cattle and poultry farming, as well as watermelon and pineapple exports.

However, Panama's manufacturing sector - including metals, plastics and textiles - showed declines, as did the fishing industry.

Between January and September, the economy grew 9.5 percent compared with the same period in 2011.