The Swedish Gambling Authority has published figures from the Danish gambling market i 2014.
In a comparison between the Danish and Swedish gambling markets, the Authority sees significant differences. The gaming machine market is noticeably larger in Denmark, while, for example, betting on horses is considerably less than in Sweden (18% in Sweden compared to 2% in Denmark of the total market).
Interestingly, the Swedish Gambling Authority estimates that the size of the black market in Denmark for betting and online casino is between 15-17 %. These numbers are in correspondence with the findings of a survey conducted by DOGA in March.
See the figures (in Swedish) from the Swedish Gambling Authority here.