| Year | Value (%) |
|---|---|
|
2021 |
4.49 |
|
2020 |
4.4 |
|
2019 |
4.43 |
|
2018 |
4.42 |
|
2017 |
4.42 |
|
2016 |
4.41 |
|
2015 |
4.55 |
|
2014 |
4.44 |
|
2013 |
5.06 |
|
2012 |
5.28 |