What makes 99% of a panda's diet?

The giant panda, also known as the panda bear or simply the panda, is a bear species endemic to China. It is characterized by its bold black-and-white coat and rotund body. The name "giant panda" is sometimes used to distinguish it from the red panda, a neighboring musteloid. Though it belongs to the order Carnivora, the giant panda is a folivore, with bamboo shoots and leaves making up more than 99% of its diet.

Source: Wikipedia