What is the X axis representing in the chart in the article? https://cdn.arstechnica.net/wp-content/uploads/2020/10/broadband-pandemic.png https://cdn.arstechn

What is the X axis representing in the chart in the article? https://cdn.arstechnica.net/wp-content/uploads/2020/10/broadband-pandemic.png https://cdn.arstechnica.net/wp-content/uploads/2020/10/broad... Edit: second quarter of 2019, third quarter of 2019, etc. I read the Q as a 0...