As anti-government protests swept through Hong Kong, the number of tourists visiting Hong Kong in August tumbled, indicating that the economic costs caused by the unrest have continued to rise.

Hong Kong's Financial Secretary Paul Chan said in his blog that the number of tourists has dropped by nearly 40% from last year. He said that this marked a sharp increase in the 5% year-on-year decline in July. 

In contrast, Hong Kong was one of the most visited cities in the world with 30 million visitors last year.