| Year | Value (%) |
|---|---|
|
2021 |
4.19 |
|
2020 |
3.91 |
|
2019 |
3.99 |
|
2018 |
4.09 |
|
2017 |
4.11 |
|
2016 |
4.27 |
|
2015 |
4.26 |
|
2014 |
4.62 |
|
2013 |
4.45 |
|
2012 |
4.49 |