The number is 5,306 per million, but the last week in 2019-2020 period is truncating the data before the spring wave ends. It is not informative. (Note again the low rate before the pandemic.)

29 weeks since week 40

2015–16: 5,345

2016–17: 5,512

2017–18: 5,544

2018–19: 5,063

2019–20: 5,306

2020–21: 5,441