Data Table
| Year | Value (SE) |
|---|
| 2000 | 0.3920 (0.0577) |
| 2001 | 0.3760 (0.0262) |
| 2002 | 0.4580 (0.0250) |
| 2003 | 0.4510 (0.0208) |
| 2004 | 0.3570 (0.0274) |
| 2005 | 0.4110 (0.0747) |
| 2006 | 0.4200 (0.0597) |
| 2007 | 0.4310 (0.0391) |
| 2009 | 0.3200 (0.0885) |
| 2010 | 0.7240 (0.1764) |
| 2011 | 0.6110 (0.1428) |
| 2012 | 0.5110 (0.0775) |
| 2013 | 0.4880 (0.0651) |
| 2014 | 0.5430 (0.1026) |
| 2015 | 0.5730 (0.1037) |
| 2016 | 0.4660 (0.0333) |
| 2017 | 0.5360 (0.0326) |
| 2018 | 0.5340 (0.0566) |
| 2019 | 0.3460 (0.0322) |
| 2020 | 0.4780 (0.0508) |
| 2021 | 0.6550 (0.1488) |
| 2022 | 0.4410 (0.1202) |
| 2023 | 0.3770 (0.0392) |
| 2024 | 0.3100 (0.0740) |
