| Variable | |
| Measure |
| Country |
|---|
| Australia |
| Brazil |
| Canada |
| France |
| Germany |
| Italy |
| Japan |
| South Korea |
| Spain |
| Sweden |
| Taiwan |
| United Kingdom |
| United States |
| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.29 | 3.28 | 3.35 | 3.42 | 3.48 | 3.55 | 3.65 | 3.72 | 3.80 | 3.91 | ||
| 1.52 | 1.50 | 1.55 | 1.62 | 1.71 | 1.73 | 1.79 | 1.86 | 1.90 | 1.97 | 2.05 | 2.15 |
| 2.28 | 2.35 | 2.41 | 2.46 | 2.51 | 2.56 | 2.62 | 2.66 | 2.71 | 2.73 | 2.73 | 2.77 |
| 3.04 | 3.06 | 3.07 | 3.09 | 3.09 | 3.11 | 3.12 | 3.14 | 3.13 | 3.17 | 3.17 | |
| 3.71 | 3.87 | 3.94 | 4.03 | 4.10 | 4.11 | 4.18 | 4.24 | 4.31 | 4.39 | 4.47 | 4.53 |
| 3.82 | 3.90 | 3.87 | 3.90 | 3.88 | |||||||
| 2.21 | 2.29 | 2.36 | |||||||||
| 1.95 | 2.00 | 2.04 | 2.13 | 2.18 | 2.22 | 2.27 | 2.33 | 2.38 | 2.45 | 2.51 | 2.51 |
| 3.76 | 3.84 | 3.82 | 3.81 | 3.80 | 3.85 | 3.83 | 3.88 | 4.03 | 4.41 | 4.58 | |
| 3.79 | 3.88 | 3.95 | 4.03 | 4.09 | 4.15 | 4.20 | 4.24 | 4.29 | 4.31 | 4.31 | |
| 1.68 | 1.72 | 1.75 | 1.79 | 1.83 | 1.87 | 1.90 | 1.96 | 2.01 | 2.10 | 2.16 | 2.23 |
| 2.65 | 2.68 | 2.70 | 2.71 | 2.75 | 2.77 | 2.78 | 2.81 | 2.84 | 2.95 | 3.03 | |
| 2.43 | 2.46 | 2.50 | 2.56 | 2.57 | 2.58 | 2.59 | 2.61 | 2.61 | 2.65 |