McDonald’s corporation – profits have tripled since 2005 off a mere 20% revenue increase. How?

See the following screenshot of McDonalds' corp. financials:

https://i.ibb.co/nDVDGrL/Screenshot-2023-07-01-011340.png

Since 2005, their revenue has increased at a very slow pace, and yet they have MASSIVELY increased their profit margins, while slowly but surely REDUCING corporate headcount.

Say what you want about the company (there's plenty to say about them), but you can't deny these numbers. The executive management of this company is doing a ridiculously good job. Anyone have any insight? Can they keep this up forever?