Pretty sure that's American Dollars. It is almost Kentucky derby day every day there . Horse racing is one of the most popular sports in the country.
Average wagering in Hong Kong is $162 million per day (USD) per
http://www.paulickreport.com/news/th...cline-in-2016/
Japan is gaining popularity too
The average daily on-course attendance of 21,494 wagered a daily average ¥8.3 billion ($83 million).