| Year | Value (billion cubic meters per year) |
|---|---|
|
2022 |
14.7 |
|
2021 |
14.8 |
|
2020 |
15 |
|
2019 |
15.1 |
|
2018 |
15.2 |
|
2017 |
15.4 |
|
2016 |
15.6 |
|
2015 |
15.7 |
|
2014 |
15.6 |
|
2013 |
15.5 |