| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| カナダ | 1.2 | 1.2 | 1.2 | 1.4 | 1.3 | 1.3 | 1.3 | 1.2 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 |
| フランス | 2.0 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.1 | 2.0 | 2.0 |
| ドイツ | 1.2 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.2 | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| イタリア | 1.7 | 1.8 | 1.7 | 1.7 | 1.9 | 1.9 | 2.0 | 2.1 | 2.1 | 2.0 | 2.1 | 2.1 | 2.1 |
| 日本 | 4.4 | 4.4 | 4.4 | 4.2 | 4.3 | 4.2 | 4.1 | 4.0 | 4.1 | 4.0 | 4.1 | 4.1 | 4.1 |
| アメリカ合衆国 | 1.0 | 1.1 | 1.0 | 1.0 | 1.1 | 1.1 | 1.0 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 |
| 英国 | 1.5 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.5 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |