| Year | Value (%) |
|---|---|
|
2021 |
38.21 |
|
2020 |
38.21 |
|
2019 |
36.54 |
|
2018 |
36.58 |
|
2017 |
34.89 |
|
2016 |
33.61 |
|
2015 |
33.66 |
|
2014 |
35.87 |
|
2013 |
35.01 |
|
2012 |
33.24 |