| Year | Value (%) |
|---|---|
|
2021 |
21.99 |
|
2020 |
21.89 |
|
2019 |
21.85 |
|
2018 |
21.72 |
|
2017 |
21.48 |
|
2016 |
21.17 |
|
2015 |
20.94 |
|
2014 |
20.77 |
|
2013 |
19.96 |
|
2012 |
20.23 |