President and Chief Executive Officer at McDonald's
Thanks, Kevin. At McDonald's, we've long prided ourselves on the relationships we built with our customers. For decades, they relied on us to provide hot, delicious food with service that's fast, friendly and reliable. That promise is what keeps them coming back. And it's why we see every guest interaction as an opportunity to drive customer loyalty, whether through digital channels like our app, in person at our restaurants and drive-thru's or off-premise through delivery. While each pillar of our Accelerating the Arches strategy is formidable on its own, the real power is when the M, C and D come together in combination with the customer at the center. That's what's enabling us to continue to make customer-recognized progress as we did once again this quarter.
For starters, McDonald's continue to set a new standard for marketing in our industry. We're focused on taste, affordability, family and brand trust. And we've raised the bar on creative excellence with one of the most talented marketing teams in the world. Behind our marketing success is McDonald's iconic core menu. This quarter, we saw strong performance that resulted in market share gains for both beef and chicken.
Our core classics aren't just the heart of our business. They're also a central part of our growth strategy. Iconic favorites like the Big Mac, Chicken McNuggets, and our world-famous French Fries drive almost 60% of our total business and about 75% of our food business and we continue to make them better. We've implemented enhanced cooking procedures and new buns in over 20 markets, including Australia, Canada and Russia that results in hotter, fresher-tasting burgers. Customers have told us that they've noticed improved taste and quality and we're excited to deploy these standards in most markets across the globe over the next couple of years.
To complement our leadership in beef, we're also focusing on growing our market share in chicken by leaning into the strength of core equities like Chicken McNuggets, as well as creating the core classics of tomorrow. We've begun to make progress with new chicken sandwiches in the U.S., and many of our international markets. We've gained IEO market share in chicken in every single one of our Top 11 markets since 2019. And after a successful pilot of McPlant in 250 restaurants in the U.K., we're excited that McPlant is now available across all of our restaurants in the U.K. and Ireland.
Of course, being customer-driven is about more than just menu items. Our investments in technology and digital are paying off as our digital engine continues to make the customer experience more seamless and fuels growth in the process. Our Top 6 markets saw more than 25% of their system-wide sales or $18 billion come from digital channels in 2021, a 60% increase over 2020.
We now have loyalty programs in more than 40 markets including the U.S., Germany and Canada, each of which launched in 2021. And in the first half of 2022, we're excited to bring MyMcDonald's Rewards to consumers in the U.K. and Australia. We're well on our way to building the world's largest loyalty program. Loyalty is the single biggest driver of digital adoption and MyMcDonald's Rewards has exceeded expectations in terms of enrollment and participation. After just six months in the U.S., there are over 30 million loyalty members enrolled and 21 million active members earning rewards.
I mentioned earlier the importance of customer relationships. With loyalty, we're building on a strong legacy of meaningful customer relationships and driving greater customer engagement and re-engagement. And in the first few months of our loyalty launch, we are seeing an increase in digital customer frequency of over 10%. Moreover, strategic partnerships have been fundamental to our digital growth strategy. Dynamic Yield has been instrumental in bringing our drive-thru's and self-order kiosks into a new era for customer engagement. Last month, we announced that Mastercard will acquire Dynamic Yield. As part of our broader strategy to better scale our assets, our collaboration with Mastercard will help us expedite and integrate capabilities across ordering channels and across the globe to continue providing an even more personalized customer experience.
Delivery is a bet we made long before COVID and continues to be a staple for consumers. Our delivery footprint has expanded to more than 33,000 restaurants in 100 countries and in the fourth quarter, our momentum continued with double-digit comps over strong growth in 2020. We've entered into new long-term strategic partnerships with two of our largest global delivery providers, Uber Eats and DoorDash. These multi-year deals are mutually beneficial and unlock tremendous value for our customers and franchisees, helping to ensure the long-term profitable growth of delivery. And as we integrate McDelivery into our app, we'll enable an even more seamless and personal customer experience.
Even as our digital and delivery engagement rises, the drive-thru's remain an essential channel, especially as customers seek safe, contactless access to McDonald's. We continue to see a higher percentage of sales in the drive-thru compared to pre-pandemic levels. While average drive-thru service times have improved since 2019 across our top markets, service time slowed in 2021 in the U.S. and many markets compared to 2020. With industry-wide labor availability challenges, our market teams are focused on the foundational elements to maximize throughput, from staffing and positioning to new technology.
Collectively, the investments we've made in our MCDs paid off in 2021 and we're confident they will drive even greater growth across the system in 2022 and beyond.
I'll turn it back over to Kevin to talk about our 2022 outlook. Kevin?