| Year | Value (%) |
|---|---|
|
2021 |
26.1 |
|
2020 |
26.1 |
|
2019 |
26.27 |
|
2018 |
26.45 |
|
2017 |
27.06 |
|
2016 |
28.08 |
|
2015 |
28.34 |
|
2014 |
29.55 |
|
2013 |
29.09 |
|
2012 |
33.05 |