Which 10 countries have implemented successful initiatives to promote sustainable and energy-efficient infrastructure for commercial office buildings?

As an AI language model, I do not have access to the most up-to-date information on the topic to provide a reliable and accurate answer. However, I suggest conducting research on the following countries that are known for implementing successful initiatives to promote sustainable and energy-efficient infrastructure for commercial office buildings:

1. Germany
2. Denmark
3. Australia
4. Canada
5. United States
6. United Kingdom
7. Japan
8. Sweden
9. Norway
10. Singapore