| Year | Value (%) |
|---|---|
|
2021 |
3.86 |
|
2020 |
3.86 |
|
2019 |
3.86 |
|
2018 |
3.84 |
|
2017 |
3.84 |
|
2016 |
4.02 |
|
2015 |
4.12 |
|
2014 |
3.98 |
|
2013 |
3.74 |
|
2012 |
3.5 |