The zoo attracts about 1.4 million visitors a year.

The zoo attracts around 10,000 visitors every day with the number increasing during the weekends.

The zoo, which is supported by tax revenues and open to everyone, attracts 2 million visitors per year, according to the Washington Post in 2005.

The zoo attracts about 1.6 million visitors each year.

Each year, the zoo attracts more than 1.2 million visitors.

The zoo attracts around 500,000 visitors a year.

The newly-built Amphitheater helped the zoo attract crowds as well.

In 2010, the zoo attracted 2.9 million visitors to its collection of more than 18,000 animals.

The zoo attracts about 300,000 visitors every year.

The zoo, which operates from March to November, attracts more than 400,000 annual visitors.