| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 6 | 6 | 5 | 14 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 |
| 6 | 7 | 7 | 8 | 9 | 10 | 10 | 12 | 12 | 13 | 14 | 15 |
| 8 | 9 | 9 | 9 | 10 | |||||||
| 7 | 8 | 9 | 9 | 11 | 13 | 14 | 14 | 15 | 15 | 16 | |
| 27 | 29 | 29 | 29 | 30 | 33 | 34 | 35 | 34 | |||
| 22 | 24 | 25 | 25 | 26 | |||||||
| 0 | 47 | 52 | |||||||||
| 19 | 21 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | 32 | 34 | |
| 12 | 14 | 15 | 15 | 16 | 16 | 16 | 16 | 17 | 18 | 18 | |
| . | |||||||||||
| 7 | 7 | 8 | 8 | 9 | 9 | 9 | 10 | 11 | 11 | 11 | 12 |
| 7 | 7 | 7 | 7 | 7 | |||||||
| 32 | 0 | 34 | 36 | 38 | 39 | 37 | 38 | 39 | 41 |