| Year | Value (mm per year) |
|---|---|
|
2020 |
498 |
|
2019 |
498 |
|
2018 |
0 |
|
2017 |
0 |
|
2016 |
0 |
|
2015 |
0 |
|
2014 |
0 |
|
2013 |
0 |
|
2012 |
0 |
|
2011 |
0 |