Chongqing, China (168 per 1,000 people)
Shenzhen, China (159 per 1,000 people)
Shanghai, China (113 per 1,000 people)
Tianjin, China (93 per 1,000 people)
Ji’nan, China (74 per 1,000 people)
London, UK (68 per 1,000 people)
Wuhan, China (60 per 1,000 people)
Guangzhou, China (53 per 1,000 people)
Beijing, China (40 per 1,000 people)
Atlanta, US (16 per 1,000 people)