I did some google searches and find this article that talks about those countries that are so crazy about gambling. It is just 5 countries but the countries included are:
Singapore, Ireland, Finland, Australia and UK in which basing from the OP's source is close but UK is not included in that year. Based on that article also, people in UK lose up to $15B on different games per year. That is just massive.
https://www.jpost.com/special-content/top-5-countries-where-people-are-crazy-about-gambling-614128According to the First Webpage the report was created and done till April 2017
Countries That Gamble The Most
By John Misachi on April 25 2017 in World Facts
Meaning that was not updated in our time now , and also the second link
Breaking it down country-by-country for gambling profits, we see China and the US topping the list. (2015 figures)
Looks like 3 years is far Long to chance the Statistics .