As an AI language model, I don’t have real-time data on future gas prices. However, I can provide you with the top 10 countries with historically higher gas prices. Please note that this information might not be accurate for 2023.

1. Hong Kong
2. Norway
3. Iceland
4. Netherlands
5. Monaco
6. Denmark
7. Italy
8. Sweden
9. Greece
10. United Kingdom

Keep in mind that this list can vary due to fluctuations in oil prices, taxes, and other economic factors. For the most up-to-date information on gas prices in 2023, it’s advisable to refer to reliable sources such as government or industry reports.