Data Table
| Year | Value (SE) |
|---|
| 2000 | 0.2810 (0.1757) |
| 2001 | 0.4120 (0.0483) |
| 2002 | 0.6020 (0.0752) |
| 2003 | 0.6480 (0.1292) |
| 2004 | 0.5090 (0.1602) |
| 2005 | 0.6630 (0.2054) |
| 2006 | 0.5000 (0.0800) |
| 2007 | 0.4750 (0.0776) |
| 2008 | 0.6450 (0.1467) |
| 2009 | 0.4810 (0.0979) |
| 2010 | 0.4510 (0.0887) |
| 2011 | 0.4740 (0.0994) |
| 2012 | 0.5590 (0.0292) |
| 2013 | 0.5510 (0.0470) |
| 2014 | 0.4210 (0.0195) |
| 2015 | 0.3740 (0.0365) |
| 2016 | 0.2930 (0.0166) |
| 2017 | 0.3560 (0.0252) |
| 2018 | 0.3300 (0.0272) |
| 2019 | 0.3210 (0.0262) |
| 2021 | 0.3140 (0.0264) |
| 2022 | 0.1770 (0.0140) |
| 2023 | 0.1440 (0.0148) |
| 2024 | 0.1570 (0.0177) |
