| Date | Percentage |
|---|---|
| 8 April 2024 | 6.7% |
| 10 April 2023 | 10.1% |
| 11 April 2022 | 3.1% |
| 12 April 2021 | 0.5% |
| 6 April 2020 | 1.7% |
| 8 April 2019 | 2.4% |
| 9 April 2018 | 3% |
| 10 April 2017 | 1% |
| 11 April 2016 | 0% |
| 6 April 2015 | 1.2% |
| 7 April 2014 | 2.7% |
| 8 April 2013 | 2.2% |
| 9 April 2012 | 5.2% |
| 11 April 2011 | 3.1% |
| April 2010 | 0.0% |
| 6 April 2009 | 5.0% |
| 7 April 2008 | 3.9% |
| 9 April 2007 | 3.6% |
| 10 April 2006 | 2.7% |
| 11 April 2005 | 3.1% |
| 12 April 2004 | 2.8% |
| 7 April 2003 | 1.7% |
| 8 April 2002 | 1.7% |
| 9 April 2001 | 3.3% |
| 10 April 2000 | 1.1% |
| 12 April 1999 | 3.2% |