1. This is an updated version of a story that appeared in June 2016.

2. This is an expanded and updated version of a story first posted in December 2011.

3. This story has been updated and was originally published in March 2016.

4. When we look back a decade from now, we expect this to be the biggest story of 2013.

5. The numbers tell a story of crude buying up to last Thursday, when oil broke above $50.

6. This story was first published on March 3,2016.

7. This story was first published on June 1,2016.

8. This story was first published on May 10,2016.

9. This story was updated on March 13,2017.

10. That story goes back to 1996.

11. This story was updated on August 30,2017.

12. This story was updated on July 6,2017.

13. The story starts in 2005.

14. I think he had a year to think about what story he wanted to tell.

15. The data told a very similar story across all of the countries in their sample.