Published 24 February 2017
Last updated 7 February 2024 + show all updates
- 7 February 2024 updated latest data up to December 2018
- 13 July 2023 October to December 2017 data added
- 28 April 2022 Added data from April to June 2021.
- 30 December 2021 April to June 2017 data added
- 30 September 2021 First published.
- 24 June 2021 Updated with October to December 2019 data
- 4 May 2021 Added July to September 2021 data.
- 10 December 2020 Updated with December 2019 to March 2020 data
- 24 September 2020 September to December 2020 data added.
- 30 June 2020 Britsh Council data for April 2016 to June 2018 available.
- 26 March 2020 Data added for January to December 2022.
- 19 December 2019 Data from April 2016 to December 2021 added.
- 19 September 2019 Updated with July to September 2019 data
- 21 June 2019 January to March 2018 data added.
- 22 March 2019 Updated with July to September 2018 data
- 29 November 2018 Data added for January to December 2023.
- 20 September 2018 Data added for 1 January to 31 March 2021.
- 28 June 2018 Updated with April to June 2020 data.
- 20 February 2018 Updated with December 2018 to March 2019 data
- 16 November 2017 Updated with July to September 2020 data
- 24 February 2017 Updated with April to June 2019 data
