Show data table
| 1988 | 44.5% | 2001 | 51.1% | 2014 | 50.5% |
| 1989 | 43.5% | 2002 | 50.2% | 2015 | 50.7% |
| 1990 | 44.2% | 2003 | 49.9% | 2016 | 49.2% |
| 1991 | 44.9% | 2004 | 49.4% | 2017 | 49% |
| 1992 | 47.1% | 2005 | 49.1% | 2018 | 49.4% |
| 1993 | 49.7% | 2006 | 48.3% | 2019 | 49.6% |
| 1994 | 49.3% | 2007 | 48.2% | 2020 | 49.1% |
| 1995 | 50% | 2008 | 48.8% | 2021 | 50.3% |
| 1996 | 51.6% | 2009 | 49.2% | 2022 | 49.6% |
| 1997 | 50.2% | 2010 | 48.9% | 2023 | 49.6% |
| 1998 | 51.7% | 2011 | 48.9% | 2024 | 50.5% |
| 1999 | 47.9% | 2012 | 49.6% | 2025 | 50.7% |
| 2000 | 48.9% | 2013 | 50.4% | 2026 | 51% |
Show data table
| 1988 | 52.9B | 2001 | 112B | 2014 | 167B |
| 1989 | 55.4B | 2002 | 113B | 2015 | 174B |
| 1990 | 60.5B | 2003 | 115B | 2016 | 175B |
| 1991 | 65.8B | 2004 | 119B | 2017 | 180B |
| 1992 | 73B | 2005 | 124B | 2018 | 189B |
| 1993 | 79.6B | 2006 | 128B | 2019 | 196B |
| 1994 | 82.8B | 2007 | 136B | 2020 | 187B |
| 1995 | 87.7B | 2008 | 143B | 2021 | 204B |
| 1996 | 93.6B | 2009 | 141B | 2022 | 223B |
| 1997 | 94.2B | 2010 | 144B | 2023 | 237B |
| 1998 | 101B | 2011 | 151B | 2024 | 250B |
| 1999 | 97.2B | 2012 | 157B | 2025 | 260B |
| 2000 | 104B | 2013 | 162B | 2026 | 270B |
Show data table
| 1988 | 47.8% | 2001 | 51.8% | 2014 | 52.4% |
| 1989 | 46.5% | 2002 | 51.6% | 2015 | 51.2% |
| 1990 | 46.8% | 2003 | 51.8% | 2016 | 50.6% |
| 1991 | 47.9% | 2004 | 54.3% | 2017 | 49.8% |
| 1992 | 49.3% | 2005 | 51.7% | 2018 | 49.2% |
| 1993 | 54.3% | 2006 | 50.9% | 2019 | 49.1% |
| 1994 | 54.3% | 2007 | 49.7% | 2020 | 57.3% |
| 1995 | 56.1% | 2008 | 50.4% | 2021 | 56% |
| 1996 | 55.9% | 2009 | 54.6% | 2022 | 53% |
| 1997 | 52.5% | 2010 | 53.4% | 2023 | 52.2% |
| 1998 | 54.4% | 2011 | 51.3% | 2024 | 55.2% |
| 1999 | 50.5% | 2012 | 51.8% | 2025 | 55.2% |
| 2000 | 50.9% | 2013 | 52.4% | 2026 | 55.2% |
Show data table
| 1988 | 56.9B | 2001 | 114B | 2014 | 173B |
| 1989 | 59.2B | 2002 | 116B | 2015 | 175B |
| 1990 | 64B | 2003 | 119B | 2016 | 180B |
| 1991 | 70.2B | 2004 | 131B | 2017 | 183B |
| 1992 | 76.3B | 2005 | 130B | 2018 | 189B |
| 1993 | 86.9B | 2006 | 135B | 2019 | 194B |
| 1994 | 91.3B | 2007 | 140B | 2020 | 218B |
| 1995 | 98.6B | 2008 | 147B | 2021 | 228B |
| 1996 | 102B | 2009 | 156B | 2022 | 238B |
| 1997 | 98.7B | 2010 | 157B | 2023 | 249B |
| 1998 | 106B | 2011 | 158B | 2024 | 273B |
| 1999 | 103B | 2012 | 164B | 2025 | 283B |
| 2000 | 108B | 2013 | 168B | 2026 | 292B |