| Year | Value (%) |
|---|---|
|
2021 |
1.51 |
|
2020 |
1.51 |
|
2019 |
1.51 |
|
2018 |
1.51 |
|
2017 |
1.51 |
|
2016 |
1.51 |
|
2015 |
1.51 |
|
2014 |
1.51 |
|
2013 |
1.57 |
|
2012 |
1.62 |