| Year | Value (%) |
|---|---|
|
2021 |
2.8 |
|
2020 |
2.8 |
|
2019 |
2.8 |
|
2018 |
2.62 |
|
2017 |
2.15 |
|
2016 |
2.15 |
|
2015 |
2.55 |
|
2014 |
2.95 |
|
2013 |
3.34 |
|
2012 |
3.74 |