Prices are for a liter of each fuel. To get a better English System comparison multiply by 4 roughly to get gallon price difference.
Germany Diesel 2cents CHEAPER,
Belgium 21 cents CHEAPER,
Canada 13 cents more expensive,
Denmark 4 cents CHEAPER,
Hong Kong 54 cents CHEAPER,
Italy 2 cents more expensive,
Holland 42 cents CHEAPER,
Switzerland 22 cents more expensive,
Viet Nam 8 cents CHEAPER
By and large the USA stands as one of the very few to still charge about a dollar more for diesel than gasoline while most of the samples show it cheaper in each country. Switzerland is the only one that would approach the USA's much higher cost while several are in the same rough difference EXCEPT below Gasoline not above. If this were France I have little doubt that the truckers would have shut down the freeways and Paris by parking their trucks in protest in the roads etc.
There are various excuses given for the USA's price structure but traditionally even here diesel has been cheaper than gasoline. No article I have seen has given any reason for the price drop in gasoline while diesel remains much higher... One of the reasons food prices have not gone down might be that the fuel largely used to work the fields and to transport the food remains artificially high.